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Example 3: A student has to score 40% of the maximum marks to pass. Priya scored 165
marks and failed by 35 marks. Calculate the maximum marks.

Solution: Marks scored by Priya = 165

Shortage of marks from passing marks = 35 Think and Answer

So, the minimum passing marks required If 9 out of 45
students in a class
= 165 + 35 = 200 are absent, then
Therefore, 40% of maximum marks = 200 what percentage of
the class is absent?
100% of maximum marks = 200 × 100 = 500
40
Thus, the maximum marks is 500.

Practice Time 13B

1. Find:

(a) 15% of 180 kg. (b) 10% of 1 hour. (c) 30% of 110 m.

(d) 18% of 200 km. (e) 65% of `1360. (f) 15% of 2 hours.

2. What per cent of

(a) 8 kg is 320 g? (b) 15 m is 90 cm? (c) 5 hr is 45 min

(d) `1000 is `256? (e) 150 L is 135L? (f) 600 is 426?

3. Solve the following.
(a) There is 50 kg of rice in a sack. 30 kg of the rice is sold. What percentage of the

sack of rice is sold?

(b) There are 160 children in the Maths Club in a Primary School. 40% of them are
girls. How many girls are there?

(c) Gyan’s father earns `50000 per month. He saves `5000. What percentage of his
earning does he save?

(d) A box contains 400 marbles. 30% of the total marbles are red. How many marbles

are red?

Brain Sizzlers

In a rose garden, 40% of the roses are red. The remaining are white and pink. Pink
roses are twice as much as the white roses. What percentage of the total roses are
white?

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