Question

Write sample space ‘S’ and number of sample point n(S) for the following experiment. Also write events A, B, C in the set form and write n(A), n(B), n(C).

Three coins are tossed simultaneously.
Condition for event A : To get at least two heads. 
Condition for event B : To get no head.
Condition for event C : To get head on the second coin.

Answer 1

Sample Space (S) = {HHH, HHT, HTT, HTH, THT, TTH, THH, TTT}
∴ n(S) = 8
 A = {HHH, HHT, HTH, THH}
∴ n(A) = 4
 B = {TTT}
∴ n(B) = 1
 C = {HHH, HHT, THT ,THH}
∴ n(C) = 4