The given histogram shows the frequency distribution of the speed of cars passing through a particular spot on a highway. Read the graph and answer the following question.
The number of cars with speed (km/h)in the interval (60 — 70) km/h is what percentage less than the number of cars with speed (km/h)in the interval (70 — 80) km/h? (correct to one decimal place)
Answer & explanation
Correct answer: option 2
Number of cars with speed b/w 60& 70 km/h = 85
Number of cars with speed b/w 70& 80 km/h = 90
Required percentage = \(\frac{90 - 85}{90}\) × 100
= \(\frac{5}{90}\) × 100
= 5.6%