Question

a survey of 150 girls showed that 63 like tea while ,87 dislike it.Out of this girls,one girl is chosen at random.the probability that the chosen girl like tea is.

Answer 1

n(s)=150
no of g like t=63....=n(l)
no of g dis like=87...=n(d)
 probability for g like t=n(l)/n(s)
                               =63/150
                               =21/50  
                              

Answer 2

Probability that a girl chosen at random likes Tea
   = total number of girls liking tea / total number of girls in the survey
   = 63 / 150
   = 0.42