Question

Four of a sample of 150 computers will be selected and tested. How many ways are there to make this selection? Type a

numerical answer in the space provided. Do not type any commas or spaces in your answer.

Answer 1

20260275

Explanation:

the question is same as selecting 4 things from 150 things

= C(150,4). (nCr formula)

=[150×149×148×147]÷[4×3×2×1]

= 49×75×149×37

= 20260275