in how many ways can 3 good flashlights and 2 defective flas

in how many ways can 3 good flashlights and 2 defective flashlights be chosen from a container containing 15 good and 4 defective flashlights?

Solution

in how many ways can 3 good flashlights and 2 defective flashlights be chosen from a container containing 15 good and 4 defective flashlights?

Number. of ways 3 good selected from 15, 15C3 = 455

Number of ways 2 defective selected from 4, 4C2 = 6

The required ways =455*6 =2730