Question

2. The sum of 2 numbers is 100. By how much will the sum increase if one of the numbers is increased by 30 and the other is increased by 20?
A.20
B.30
C.50
D.150

Answer 1

Answer:

C).50

Step-by-step explanation:

As 50 is the number if one 50 is increase by 30 and another with 20. So here we obtain 70 and 80. Sum of 70 and 80 is 150. As previous was 100 and now 150 the change in number is 50

Answer 2

Answer:

Assume that the number is 100. Then, 20% of 100 is 20×100100 = 20. Increasing 100 by 20% means increasing 100 by 20 and the resultant number is 120.

Now the new number is 120. 20% of 120 is 20×120100 = 120/5 = 24. Thus decreasing 120 by 20% means same as subtracting 24 from 120 and the resultant number will be 120 — 24 = 96.

Since 96 is less than 100, the original number, net decrease

=100−96100×100

=4100×100

=4O

Step-by-step explanation:

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