9th Class
Mathematics
Probability
Question Bank
Probability
question_answer
Over a 70 days period David records the number of phone calls he receives. The graph of his data is shown alongside. The Possibility that on any day David will receive at least 3 phone calls.
A)0.453
B) 0.534
C) 0.543
D) 0.435
Correct Answer:
B
Solution :
(b): \[n\left( E \right)=46\] \[n\left( S \right)=86\] \[n\left( P \right)=\frac{46}{86}=0.534\]