JEE Math Practice Question
A fair coin is tossed a fixed number of times. If the probability of getting 7 heads is equal to probability of getting 9 heads, then the probability of getting 2 heads is :
- A.$${{15} \over {{2^8}}}$$
- B.$${{15} \over {{2^{12}}}}$$
- C.$${{15} \over {{2^{13}}}}$$
- D.$${{15} \over {{2^{14}}}}$$
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