Question

A tray contains 16 chocolate chip cookies and 12 oatmeal raisin cookies. HOw many ways can a child select 3 cookies that include at least 1 chocolate chip cookie

Answer 1

Number of ways chosen cookies = 8 ways

Explanation:

Given;

Total number of chocolate chip cookies = 16

Total number of oatmeal raisin cookies = 12

Total number of cookies choose = 3

At least 1 chocolate cookie

Find:

Number of ways chosen cookies

Computation;

Number of total ways = 2³

Number of total ways = 8

If at least on cookie is chocolate cookie,

Number of ways chosen cookies = Number of total ways - 1

Number of ways chosen cookies = 9 - 1

Number of ways chosen cookies = 8 ways