Geometric means of X1 and X2 is________________?

If x is 4 and the distribution is 2, 3, 4, 5, 6, the sum of squared deviations from the x will be______________?

A. 8

B. 10

C. 6

D. 12

A contractor employs 20 male, 15 female and 5 children in his factory. Male wages are Rs. 10 per day, female Rs. 8 per day, and children Rs. 3 per day. The weighted x of wages paid per day will be_____________?

A. 3.86

B. 8.37

C. 9.21

D. 10.63

In a week the prices of a bag of rice were 350 ,280, 340, 290, 320, 310, 300. The range is_____________?

A. 60

B. 90

C. 70

D. 100

If a distribution has two modes then this distribution is called______________?

A. Uni-Modal

B. Bi-Modal

C. Tri-Modal

D. Multi-Modal

The Harmonic Mean of any two numbers is________________?

A. a+b2

B. 2aba+b

C. ab−−√

D. a+b