Making Better Estimates on the Basis of Average

Q.

The average milk given by 15 cows is 8 litres a day. Considering all the cows give equal amount of milk,

what is the total milk given by 7 cows?

1. 56 litres

2. 63 litres

3. 77 litres

4. 69 litres

Q.

Find the value of p if the mean of the given observation is 17.
5, 8, 10, 12, 20, p, 25

1. 10
2. 22
3. 21
4. 19

Q.

The Perimeter of a rectangle is 54 cm. The area of another rectangle is 44 $c{m}^2$.

The lengths of both rectangles are same. What is the average of the width of both rectangles?

1. 3 : 5

2. 2.5 : 1.5

3. Cannot be determined

4. 2 : 3

Q. What is the average amount of money spent by Sonam if she has spent ₹150, ₹170, ₹190, ₹210 and ₹230 in 5 days?

1. ₹185
2. ₹195
3. ₹190
4. ₹200

Q.

What is the average number obtained when a dice is thrown three times and the resultants are :

The highest number on it , the lowest number on it , the difference between the highest and lowest number ?

1. 4
2. 4.5
3. 3
4. 5

Q.

Find the mean of the squares of the first seven whole numbers.

1. 10
2. 13
3. 50
4. 91

Q.

Choose a letter x, y, z, p etc...., wherever necessary, for the unknown (variable) and write the corresponding expressions for the given statement:

Area of the rectangle with length k units and breadth n units.

Q.

What is the average number obtained when a dice is thrown three times and the resultants are :

The highest number on it , the lowest number on it , the difference between the highest and lowest number ?

Q.

What is the average of sides of an isosceles triangle whose base is 7 cm and equal sides are 4 cm?

1. 5.5 cm

2. 5 cm

3. 6 cm

4. 6.5 cm

Q.

What is the total runs Scored by Virat in 6 innings if his average score is 52?

1. 336

2. 306

3. 312

4. 324