Question

The heights (in cm) of students of a class is tabulated below.
$\begin{array}{cc}\text{Height}& \text{Number of students}\\ 150-154& 4\\ 155-159& 3\\ 160-164& 2\\ 165-169& 1\\ 170-174& 2\\ 175-179& 2\\ 180-184& 4\\ 185-189& 2\\ Total& 20\end{array}$
Identify the correct option.

• A. Number of students having height in range of 160-174 cm is 2.
• B. Number of students having height in range of 160-174 cm is 3
• C. Number of students having height in range of 160-174 cm is 4.
• D. Number of students having height in range of 160-174 cm is 5

Answer 1

The correct option is D Number of students having height in range of 160-174 cm is 5

The number of students having height in the range of 160 - 164 cm = 2

The number of students having height in the range of 165 - 169 cm = 1

The number of students having height in the range of 170 - 174 cm = 2
$\therefore$ the number of students having height in range of 160-174 cm = 2 + 1 + 2 = 5.