Solution of problem N2697 Bernoulli probability theory

Solution of problem N2697 Bernoulli probability theory

2697. The probability of a miss in a shot is 0.3. Find the probability that out of 7 shots fired: a) hit the target no more than three times; b) exactly 3 times overshot; c) at least four times hit the target.

Additional information:

Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)