Question

There are 4 chocolate chip cookies and 12 oatmeal cookies in a jar. If you reach in and randomly choose 2 cookies without replacing the first , what is the probability that both will be chocolate chip?

1/9
3/64
1/11
1/20

Answer 1

choose 2 choc from4 -- no replacing, no order = 4C2

choose 2 sweets from16 --noreplacing , no order = 12C2

p(get2choc) = 4C2/16C2 = 1/20