Question

There are letter tiles in a bag. Four A's, five B's, six C's and five D's. You select one tile, replace it, and then draw another. P( C and D)=____

Answer 1

Answer: 3/40

Explanation:

Number of A's = 4

Number of B's = 5

Number of C's = 6

Number of D's = 5

Total number of letters tiles = 20

Probability of selecting C = 6/20 = 3/10

Probability of selecting D = 5/20 = 1/4

P( C and D)= 3/10 × 1/4 = 3/40