1800 families with 2 children were selected randomly and the following data were recorded: Compute the … girls (ii) 1 girl (iii) No girl
Answers:
(i) Total no. of families n(S) = 1800
Event = {2 girls}
n(E) = 700
P(E) = ?
∴ P(E) = n(E)/n(S) = 700/1800 = 7/18
(ii) Event = {1 girl}
n(E) = 850
P(E) = ?
∴ P(E) = n(E)/n(S)
= 850/1800
= 17/36
(iii) Event = {No girl}
n(E) = 250
P(E) = ?
∴ P(E) = n(E)/n(S) = 250/1800 = 5/36