Question

If x€ -3, -2,-1, 0, 1, 2, 3), find the solution set of each of the following inequations:-
(i)x+2<1
(ii) 2x - 1<4
(iii)2/3x<1
(iv) 1- x >0
(v)3-5x<-1
(vi)2-3x>1
(vii)-6≥2x-4
(viii)3x-5≥-12
(ix) 14-2x <6
​

Answer 1

Answer:

Given :-

75% of total 1500 are boys.

⅓ are boys

And No. of girls = 40%

To find :-

Total students

Solution :-

No. of boys :-

75% of 1500

75/100 × 1500

75 × 15

1125 boys

Now,

Numbers of girls = 1500 - 1125

=> 375

Total spectacles =>

⅓ × 1125

375

In girls

40/100 × 375

4/10 × 375

150

Total students that wear spectacles = 150 + 375 = 525

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