## 6. Coefficient of Variation is 7. Roster form of the set (x:x is an integer and -3 < x < 7}is. 8. Geometric Mean between two

6. Coefficient of Variation is

7. Roster form of the set (x:x is an integer and -3 < x < 7}is.

8. Geometric Mean between two positive real numbers a and bis

Part-B

9. If A={1,2,3,4} and B={3,4,5,6,7} find (1) AUB (ii) ANB (iii) A-B (iv) B-A.

10. Which term of the A.P. 3, 8, 13, 18,

is 78 ?

11. In a survey of 400 students in a school, 100 were listed as taking apple

juice, 150 as taking orange juice and 75 were listed as taking both apple as well

as orange juice. Find how many students were taking neither apple juice nor

orange juice. OR

Find the sum of series: 7 + 77 + 777 +

…….. To n terms

12. Find Mean deviation about mean for the following data:

5

10

15

20

25

X

F

7

4

6

الا

un

## Answers ( )

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