RRB NTPC Mains or Stage 2 Model Paper 9 with solutions

Question : 4 of 120

Marks: +1, -0

Mr. Thomas invested an amount of ₹ 13,900 divided in two different schemes A and B at the simple interest rate of 14% p.a. and 11% p.a. respectively. If the total amount of simple interest earned in 2 years be ₹ 3508, what was the amount invested in Scheme B?

₹ 6400
₹6500
₹ 7200
₹ 7500

Validate

Solution:

(a) Let the sum invested in Scheme A be ₹ x and that in Scheme B be₹ (13900 – x).Then,

[{x ×14 ×2} /100]+[{(13900 -x) ×11 ×2}/100] =3508

⇒ 28x – 22x = 350800 – (13900 × 22)

⇒ 6x = 45000

⇒ x = 7500.

So, sum invested in Scheme B = ₹ (13900 –7500) = ₹ 6400.

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