Question

EXERCISE 11.2
1. Check whether the following numbers are in proportion or not.
(a) 6, 15, 8, 20
(b) 7, 18, 9, 16
(c) 20,5, 100, 20
(d) 11, 16, 20, 7
(e) 9, 12, 6,8
(f) 4,9, 7, 16
2. Fill in the boxes.
(a) 2:4:
(b) O:4:: 2:8
(c) 1: O:3:15
(d) 4:7:20:
(e) 6:1:0:2 (6) O:8::1:4
3. Check whether the given ratios form a proportion or not.
:10​

Answer 1

Answer:

Here is ur answer

Step-by-step explanation:

Exercise 11.2

1.For this question you just need to multiply the means and multiply the extremes which are equal,if not equal then they are not in proportion.

Example

Solve:6,15,8,20

Mean=Extremes

15x8=20x6

120=120

2.Just keep the unknown values as x

2.Just keep the unknown values as xExample

2.Just keep the unknown values as xExampleSolve: 2:4::x:x

Mean=Extremes

2x=4x

2x-x=4

x=4