1800 Families With 2 Children Were Selected Randomly And Following Data Were Recorded

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