Succession on a newly exposed site that was not previously occupied by soil and vegetation refers to

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#Question id: 14698

#SCPH06 I Botany

A bag has 13 red, 14 green and 15 black balls. The probability of getting exactly 2 blacks on pulling out 4 balls is P1. Now the number of each colour ball is doubled and 8 balls are pulled out.The probability of getting exactly 4 blacks is P2. Then

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#Question id: 14699

#SCPH06 I Botany

If A and B are arbitrary events, then

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#Question id: 14700

#SCPH06 I Botany

One mapping is selected at random from all the mappings from the set S = {1,2,3,...n} into itself. The probability that the selected mapping is one to one is

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#Question id: 14726

#SCPH06 I Botany

For two events A and B  

(i) not less than P(A) + P(B) -1

(ii)not greater than P(A) + P(B)

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#Question id: 14727

#SCPH06 I Botany

Two persons A and B have respectively n + 1 and n coins, which they toss simultaneously. Then the probability that A will have more heads than B is

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#Question id: 14728

#SCPH06 I Botany

A student appears for tests I, II and III. The student is successful if he passes either in tests I and II or tests I and III. The probabilities of the student passing in tests I, II and III are p, q and 1/2 respectively. If the probability that the student is successful is 1/2. Then