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Assertion (A) : A fair coin is tossed n times. If the probablities of getting 4,5 and 6 heads be in A.P then n is equal to 7,14 Reason (R ) : If .^(n)C_(r+1), .^(n)C_(r ), .^(n)C_(r+1) are in A.P then (n-2r)^(2)=n+2 The correct answer is

Answer»

Both A and R are true, R is the correct EXPLANATION of A
Both A and R are true, R is not the correct explanation of A
A is true but R is false
A is false R is true

Answer :A


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