CBSE Class 10 Mathematics Statistics Worksheet Set E

 Statistics

Q.- The mean of 10 numbers is 20. If 5 is subtracted from every number, what will be the new mean?

More question-

1.The mean of the six numbers is 43. If one of the no. is excluded, the mean of the remaining no. is41.Then the excluded no. is:

(A) 53

(B) 84

C) 12

(D) None

2.The average temperature of Tuesday,Wednesday & Thursday was 42°C. The average temperature of Wednesday, Thursday & Friday was 47°C, if the temperature on Tuesday was 43°C, then the temperature on Friday was:

(A) 53°C

(B) 49°C

(C) 50°C

(D) 58°C

3.The mean of first 5 multiple of 5 is:

(A) 14

(B) 16

(C) 13

(D) 15

4.The mean of 10 observations is 25. If one observation, namely 25, is deleted, the new mean is:

(A) 22

(B) 28

(C) 20

(D) 25

5.The mean of 6, y, 7, x, and 14 is 8 then:

(A) x +y = 13

(B) x - y =13

(C) 2x + y =13

(D) x2 + y2 =15

6.The average weight of a sample of 10 apples is 52 g. Later it was found that the weighing machinehad shown the weight of each apple 10 g less. The correct average weight of an apple is:

(A) 54 g

(B) 52 g

(C) 62 g

(D) 56 g

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