Range of Average

Q.

The classes in a frequency distribution range from 110 to 170 with class interval being 10.

What is the Mid value of this Class Distribution?

1. 145

2. 150

3. 140

4. 142.5

Q.

The batting average of Rohit Sharma ranges from 40 to 51 in a Calendar year.

If he starts in the month of March and increases his average by 1 every month, what will be his average in January next year?

1. 49

2. 51

3. 50

4. 48

Q. Question 6
The class marks of a continuous distribution are 1.04, 1.14, 1.24, 1.34, 1.44, 1.54 and 1.64.
Is it correct to say that last interval will be 1.55 - 1.73? Justify your answer.

Q. The heights (in cm) of students of a class is tabulated below.
$\begin{array}{cc}\text{Height}& \text{Number of students}\\ 150-154& 4\\ 155-159& 3\\ 160-164& 2\\ 165-169& 1\\ 170-174& 2\\ 175-179& 2\\ 180-184& 4\\ 185-189& 2\\ Total& 20\end{array}$

i) What type of frequency distribution is this?
ii) Find the umber of students having height in the range of 160-174 cm.

Q.

5 years ago, the average age of ram and shyam was 20 years. now the average age of ram, shyam, and mohan is 30 years. what will be mohans age 10 years hence?

Q. The heights (in cm) of students of a class is tabulated below.
$\begin{array}{cc}\text{Height}& \text{Number of students}\\ 150-154& 4\\ 155-159& 3\\ 160-164& 2\\ 165-169& 1\\ 170-174& 2\\ 175-179& 2\\ 180-184& 4\\ 185-189& 2\\ Total& 20\end{array}$

i) What type of frequency distribution is this?
ii) Find the umber of students having height in the range of 160-174 cm.

Q. Average of a dataset lies between the minimum and maximum values in the dataset.

1. False
2. True

Q. What is the average of 7 consecutive integers starting from 7?