The histogram shows the number of patients in a hospital in different age groups (in years).
The number of patients aged 10 years or more but less than 40 years is what percent of the number of patients aged 50 years or more but less than 80 years?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 72.5%
Each bar covers one 10-year class, so an age range is the sum of the bars inside it. “10 or more but less than 40” means the classes 10–20, 20–30 and 30–40.
Aged 10 to below 40: \(14+20+24=58\)
Aged 50 to below 80: \(32+26+22=80\)
Percentage \(\displaystyle =\frac{58}{80}\times100=72.5\%\)