Question

How many students have their height more than $135$ cm and less than $155$ cm ?

• A. $56$
• B. $66$
• C. $76$
• D. $86$

Answer 1

The correct option is B $66$

Number of students in $(135$ cm $-140$ cm$)=20$
Number of students in $(140$ cm $-145$ cm$)=18$
Number of students in $(145$ cm $-150$ cm$)=16$
Number of students in $(150$ cm $-155$ cm$)=12$
Total number of student with height $(135$ cm $-155$ cm$)=20+18+16+12=66$