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The mean of three numbers is 40. All the three numbers are different natural numbers. If lowest is 19, what could be highest possible number of remaining two numbers? (a) 81 (b) 40 (c) 100 (d) 71

The correct answer is (a) 81 Solution From the given data we observe that The mean of three numbers is 40. Lowest number = 19 Let us assume... View Article

On tossing a coin, the outcome is (a) only head (b) only tail (c) neither head nor tail (d) either head or tail

The correct answer is (d) either head or tail Solution On tossing a coin the outcome will either be head or tail, and both are equally... View Article

Some integers are marked on a board. What is the range of these integers? (a) 31 (b) 37 (c) 20 (d) 3

The correct answer is (b) 37 Solution The difference between the highest and lowest observations in a given data is called its Range. Range... View Article

In a school, only 2 out of 5 students can participate in a quiz. What is the chance that a student picked at random makes it to the competition? (a) 20% (b) 40% (c) 50% (d) 30%

The correct answer is (b) 40% Solution From the given details we note that In a school, only 2 out of 5 students can participate in a quiz.... View Article

There are 2 aces in each of the given set of cards placed face down. From which set are you certain to pick the two aces in the first go?

The correct answer is The probability of picking the two aces in the first go is in option (c).... View Article

Out of 5 brands of chocolates in a shop, a boy has to purchase the brand which is most liked by children. What measure of central tendency would be most appropriate if the data is provided to him? (a) Mean (b) Mode (c) Median (d) Any of the three

The correct answer is (b) Mode Solution Mode is the observation that occurs most frequently in the data. A mode is defined as... View Article

The median of the data: 3, 4, 5, 6, 7, 3, 4 is (a) 5 (b) 3 (c) 4 (d) 6

The correct answer is (c) 4 Solution In Mathematics, the median is defined as the middle value of a sorted list of numbers. The middle... View Article

The range of the data: 21, 6, 17, 18, 12, 8, 4, 13 is (a) 17 (b) 12 (c) 8 (d) 15

The correct answer is (a) 17 Solution In statistics, the range is the difference between maximum and minimum values of a data set. The... View Article

Which measures of central tendency get affected if the extreme observations on both the ends of a data arranged in descending order are removed? (a) Mean and mode (b) Mean and Median (c) Mode and Median (d) Mean, Median and Mode

The correct answer is (a) Mean and mode Solution The average or Arithmetic Mean or mean of a given data is defined as Sum of all... View Article

The number of trees in different parks of a city are 33, 38, 48, 33, 34, 34, 33 and 24. The mode of this data is (a) 24 (b) 34 (c) 33 (d) 48

The correct answer is (c) 33 Solution Mode is the observation that occurs most frequently in the data. A mode is defined as the value... View Article

Let x, y, z be three observations. The mean of these observations is (a) (x × y × z)/3 (b) (x + y + z)/3 (c) (x – y – z)/3 (d) (x × y + z)/3

The correct answer is (b) (x + y + z)/3 Solution The average or Arithmetic Mean or mean of a given data is defined as Sum of all... View Article

Write the number in the box such that

Solution: Let us assume the missing number be N. Then, (3/7) × N = 15/98 By cross multiNlication we get, N = (15/98) × (7/3)... View Article

Reemu read (1/5)th pages of a book. If she reads further 40 pages, she would have read (7/10)th pages of the book. How many pages are left to be read?

Solution From the given details we know that Reemu read (1/5)th pages of a book. Let us assume the total number of pages in the book be... View Article

In a class of 40 students, 1/5 of the total number of students like to eat rice only, 2/5 of the total number of students like to eat chapati only and the remaining students like to eat both. What fraction of the total number of students like to eat both?

Solution From the given details we know that Number of students in a class=40 students 1/5 of the total number of students like to eat rice... View Article

If 2/3 of a number is 10, then what is 1.75 times of that number?

Solution From the given details we know that 2/3 of a number is 10. Let us assume the number be ‘N’. Then, 2/3 of N = 10 2/3... View Article

Which letter comes 2/5 of the way among A and J?

Solution There are 10 letters from A to J So, 2/5 of 10 = 2/5 × 10 = 2 × 2 = 4 The 4th letter from A to J is D.... View Article

What happens to the value of a fraction if the denominator of the fraction is decreased while numerator is kept unchanged?

Solution The value of a fraction is increased when the denominator of the fraction is decreased while the numerator is kept unchanged. Example:... View Article

If 5 is added to both the numerator and the denominator of the fraction 5/9, will the value of the fraction be changed? If so, will the value increase or decrease?

Solution Yes, the value of the fraction is changed and also the value is increased. If 5 is added to both the numerator and denominator of the... View Article

The reciprocal of 4/7 is 4/7. Say true or false.

The given statement is False Solution The reciprocal is defined as the multiplicative inverse of a number. In other words, the reciprocal... View Article

2/3 of 8 is same as (2/3) ÷ 8. Say true or false.

The given statement is False Solution 2/3 of 8 = (2/3) × 8... View Article