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Rs aggarwal solutions

A number decreased by 8% gives 69. The number is

(a) 80 (b) 75 (c) 85 (d) None of these

Solution:-

(b) 75

Because,

Let the required number be x

Now,

= x - 8% of x = 69

= [x - {(8/100) × x}] = 69

= [x - {8x/100}] = 69

= [x - {2x/25}] = 69

= [(25x - 2x)/25] = 69

= [23x/25] = 69

= x = (69 × 25)/23

= x = (75)

A number decreased by 8% gives 69. The number is

(a) 80 (b) 75 (c) 85 (d) None of these

Solution:-

(b) 75

Because,

Let the required number be x

Now,

= x - 8% of x = 69

= [x - {(8/100) × x}] = 69

= [x - {8x/100}] = 69

= [x - {2x/25}] = 69

= [(25x - 2x)/25] = 69

= [23x/25] = 69

= x = (69 × 25)/23

= x = (75)

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