It takes an older pump 3 times as long to drain a certain pool as it does a newer pump. Working together, it takes the two pumps
1 answer:
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Answer:
224
Step-by-step explanation:
Given that a committee of six Congressmen will be selected from a group of eight Republicans and four Democrats.
Total no of ways of selecting 6 persons from the given list
= taking 6 persons out of 12 persons
=
Favourable ways
= ways of selecting 3 republicians
= 3 republicians and 3 democrats
=
the number of ways of obtaining a committee with exactly three Republicans.
= 224