A telecommunication company has 7 satellites, two of which are sending a week signal. If two are picked at random without replac

Question

d1i1m1o1n [39]

3 years ago

9

A telecommunication company has 7 satellites, two of which are sending a week signal. If two are picked at random without replac

ement, find the probability that both are sending a week signal

Mathematics

1 answer:

Setler [38] · Answer 1 · 2022-03-31T11:45:40+03:00

Setler [38]3 years ago

5 0

2/7 is the probability that the first satellite sends a weak signal. That leaves 6, one of which sends a weak signal. So the probability that the second also sends a weak signal is 1/6. Combine these and we get 2/7×1/6=1/21.