RRB Non Technical Model Papers 9 with solutions

Question : 39 of 100

Marks: +1, -0

In a bag, there are coins of 25 paise, 10 paise and 5 paise in the ratio in 1 : 2 : 3. If there are all in 30 in the bag, how many coins of 5 paise are there?

Validate

Solution:

(2) Let the no. of coins of 25 paise, 10 paise and 5 paise are x, 2x and 3x respectively,
∴ From question,

0.25x + 0.10 × 2x + 0.05× 3x =₹ 30

⇒ 0.25x + 0.20x + 0.15 x

=₹ 30

⇒ 0.60x = 30 ⇒{60x}/100₹30

⇒ x =₹{30 ×100}/60= 50

∴ No. of coins of 5 paise are 3x = 3 × 50 = 150

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