Thirty airmail and 40 ordinary envelopes are the only envelopes in a bag. Thirty-five envelopes in the
bag are unstamped, and 5/7 of the unstamped envelopes are airmail letters. What is the probability
that an envelope picked randomly from the bag is an unstamped airmail envelope?

Question

Thirty airmail and 40 ordinary envelopes are the only envelopes in a bag. Thirty-five envelopes in the
bag are unstamped, and 5/7 of the unstamped envelopes are airmail letters. What is the probability
that an envelope picked randomly from the bag is an unstamped airmail envelope?

anonymous · Answer

please help me...

anonymous · Answer

5/7?

anonymous · Answer

dont really know this much but im guessing its that?

anonymous · Answer

answer is 1/7,bt i am not sure about this answer