Question

Answer 8,9,10
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Answer 1

Answer:

Step-by-step explanation:

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Answer 2

8. let the total no. of students be x

%age of students present = (100-30)%

= 70%

According to the question

70% of x = 84

70/100 × x = 84

7x/10 = 84

x = 84×10/7

x = 120

Hence, the strength of the class was 120.

9. let the money uma has be ₹x

According to the question

x-10%of x = 540

9x/10 = 540

x = 540×10/9

x = 600

hence, uma has ₹ 600.

10. let the score of roy be x

according to the question

x+20% of x = 48

6x/5 = 48

6x = 240.

x = 240/6

x = 40

hence, roy scored 40.