Avideo store has 27 new release movie posters. how many ways can the manager choose a group of 4 for a prize?

A video store has 27 new release movie posters.

the manager choose a group of 4 for a prize.

When we choose a group of 4, the order does not matters.

So we use combination

We need to find 4 from 27 new release movie posters.

27C4

nCr =

27C4 = = = 17550

The manager can choose a group of 4 for a prize in 17,550 ways.

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.

c. side angle side. u shares the same sides