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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 questions. 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)

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 questions. 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) Correct Answer 5.6%

Given:

 

Speed Of Cars

(In Km/h)

Number of Cars

40 – 50

50

50 – 60

70

60 – 70

85

70 – 80

90

80 – 90

60

90 - 100

45

Calculation:

Number of Cars Between the Speed Interval of (60 - 70) Km/h = 85

Number of Cars between the Speed Interval of (70 - 80) Km/h = 90

Difference between the Two Speed Intervals = 90 – 85 = 5

Less Percentage = (Difference/Number of Cars between Interval (70 - 80)Km/h) × 100

⇒ Less Percentage = (5/90) × 100

⇒ 50/9 = 5.6%

∴ The Number of Cars between speed interval (60 - 70) Km/h is 5.6% less than the Number of Cars between speed interval (70 - 80) Km/h  

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