Q5 of 23 Page 1

Attempt any two sub-questions from the following:

The following is the frequency distribution with unknown frequencies:



Find the value of a, hence find the frequencies. Draw a histogram and frequency polygon on the same coordinate system.

Total frequency = 50

∴


⇒ (a + 3a + 4a + 2a)/2 = 50


⇒ 10a/2 = 50


⇒ a = 50 × 2/10


⇒ a = 10


∴ a/2 = 10/2 = 5


3a/2 = 3 × 10/2 = 15


2a = 2 × 20 = 40


a = 10


Hence the total would be represented as given below:




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Attempt any two sub-questions from the following:

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Attempt any two sub-questions from the following:

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 5

Attempt any two sub-questions from the following:

From the same place at 7 a.m. A started walking in the north at the speed of 4 km/hr. After 1 hour B started cycling in the east at a speed of 8 km/hr. At what time will they be at a distance of 20 km apart from each other?