JEE Math Practice Question
Let S = {1, 2, . . . . . ., 20}. A subset B of S is said to be "nice", if the sum of the elements of B is 203. Then the probability that a randonly chosen subset of S is "nice" is :
- A.$${5 \over {{2^{20}}}}$$
- B.$${7 \over {{2^{20}}}}$$
- C.$${4 \over {{2^{20}}}}$$
- D.$${6 \over {{2^{20}}}}$$
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