On one page of a telephone directory, there are 200 phone numbers. The

1.	On one page of a telephone directory, there are 200 phone numbers. The frequency distribution of their unit's digits is given below:Unit's digit0123456789Frequency19222319212423181615One of the numbers is chosen at random from the page. What is the probability that the unit's digit of the chosen number is (i) 5? (ii) 8?
Answer» On one page of a telephone directory, there are 200 phone numbers. The frequency distribution of their unit's digits is given below: $\begin{matrix} Unit's digit & 0 & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 Frequency & 19 & 22 & 23 & 19 & 21 & 24 & 23 & 18 & 16 & 15 \end{matrix}$ One of the numbers is chosen at random from the page. What is the probability that the unit's digit of the chosen number is (i) 5? (ii) 8?

On one page of a telephone directory, there are 200 phone numbers. The frequency distribution of their unit's digits is given below:Unit's digit0123456789Frequency19222319212423181615One of the numbers is chosen at random from the page. What is the probability that the unit's digit of the chosen number is (i) 5? (ii) 8?

Answer»

On one page of a telephone directory, there are 200 phone numbers. The frequency distribution of their unit's digits is given below:

$\begin{matrix} Unit's digit & 0 & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 Frequency & 19 & 22 & 23 & 19 & 21 & 24 & 23 & 18 & 16 & 15 \end{matrix}$

One of the numbers is chosen at random from the page. What is the probability that the unit's digit of the chosen number is (i) 5? (ii) 8?