The GMAT Sample Math question for the day is from the topic Probability.
The man will hit the target even if he hits it once or twice or thrice or all four times in the four shots that he takes.
So, the only case where the man will not hit the target is when he fails to hit the target even in one of the four shots that he takes.
The probability that he will not hit the target in one shot = 1 -
=
Therefore, the probability that he will not hit the target in all the four shots =
Hence, the probability that he will hit the target at least in one of the four shots = 1 -
=
.
eBooks on Permutation Combination & Probability
This ebook with over 110 questions in about 100 pages covers all major concepts in Permutation combination (combinatorics) and Probability. Includes typical GMAT like problems such as "tossing of coins", "rolling of dice" and "selecting cards from a pack of cards" 
This eBook is a practice test comprising 95 questions on Permutation, Combination and Probability. These questions are objective type multiple choice questions. Each question is provided with correct answers and detailed explanations at the end of the test. 
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