Question

the mean of 15 numbers is 25. If each number is multiplied by 4, mean of the number is?

Answer 1

Answer:

100

Step-by-step explanation:

mean=25

every number is multiplied by 4,

then 4 is common

Therefore, 25x4=100

Answer 2

Given, mean of 15 numbers is 27

Let the 15 numbers be, x1, x2, x3 -----x15

= x1,x2,x3 ----x15/15 = 27

= x1,x2,,x3 -----x15

= 27*5

= 405 (this is an equation 1)

Now we will multiply this number with 4

the new set of numbers will be:

x1*4

x2*4

x3*4

x4*4

x5*4

x6*4

x7*4

x8*4

x9*4

x10*4

x11*4

x12*4

x13*4

x14*4

x15*4

= answer /15

= 4*27 = 108 (now we will use the equation 1)

So the answer to this will be 108.

I hope this helps you, let us know if there is any confusion.