Question

Mean of 5 observations is 30. If each observation is multiplied by 2 and then 3 is added in it, then mean of new set of observations is____.

Answer 1

Answer:

63

Step-by-step explanation:

(A+B+C+D+E)/5 = 30

A+B+C+D+E = 150

to find: (2A+3+2B+3+2C+3+2D+3+2E+3)/5

((2a+2b+2c+2d+2e)+15)/5

(2(a+b+c+d+e)+15)/5 = ((2 x 150)+15)/5

315/5 = 63

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