RRB Non Technical Model Papers 7 with solutions

Question : 18 of 100

Marks: +1, -0

Successive discounts of 10%, 20% and 30% is equivalent to a single discount of –

Solution:

(2) Successive discount of 10% and 20% is

[10 +20-{10 ×20}/100]%

= (30 – 2)% = 28%

Now, successive discount of 28% and 30% is

[28+ 30-{28 ×30}/100]%

(58 – 8.4)% = 49.6%

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