Let p be the probability of happening of an event , and q of its non- happening then the total chance of r successes in n trials ` 0 le r le n , ` isA. `""^(n )C_(r) .p^(r) . Q^(n-r)`B. `""^(n)C_(r).p^(r-1).q^(r+1)`C. `""^(n)C_(r).P^(r+1).q^(r-1)`D. `""^(n)C_(r).P^(r ).q^(r )`

Let p be the probability of happening of an event , and q of its non-

1.	Let p be the probability of happening of an event , and q of its non- happening then the total chance of r successes in n trials ` 0 le r le n , ` isA. `""^(n )C_(r) .p^(r) . Q^(n-r)`B. `""^(n)C_(r).p^(r-1).q^(r+1)`C. `""^(n)C_(r).P^(r+1).q^(r-1)`D. `""^(n)C_(r).P^(r ).q^(r )`
Answer» Correct Answer - A

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