Question

On one page of a telephone directory there were $200$ telephone numbers. The frequency distribution of their unit place digit is given in the following table:

Digit	$0$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$
Frequency	$22$	$26$	$22$	$22$	$20$	$10$	$14$	$28$	$16$	$20$

• A.
  $0.15$
• B.
  $0.17$
• C.
  $0.18$
• D. None of these
  

Answer 1

The correct option is C

$0.18$
The probability that the digit in its unit place is more than $7=\frac{16+20}{200}=\frac{36}{200}=0.18$