A computer mechanic charges repairing cost of different components as tabulated below:

ICSE Class 10 Mathematics PYQ · 2026 Improvement · Section B

4(i)Written · 2026 · Section B · 2026 Improvement

A computer mechanic charges repairing cost of different components as tabulated below:

ComponentRepairing cost (₹)Discount (%)
A₹500020%
B₹650030%

The rate of GST is 18%. Find the total:

(a) discount

(b) amount of GST

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(a) For Component A,

Repairing cost = ₹ 5,000, Discount = 20%

Discount = $\frac{20}{100} \times 5000$ = ₹ 1,000

For Component B,

Repairing cost = ₹ 6,500, Discount = 30%

Discount = $\frac{30}{100} \times 6500$ = ₹ 1,950

Total discount = ₹ 1,000 + ₹ 1,950 = ₹ 2,950.

Hence, the total discount = ₹ 2,950.

(b) For Component A,

Cost after discount = ₹ 5,000 − ₹ 1,000 = ₹ 4,000

For Component B,

Cost after discount = ₹ 6,500 − ₹ 1,950 = ₹ 4,550

Total taxable amount = ₹ 4,000 + ₹ 4,550 = ₹ 8,550

GST = $\frac{18}{100} \times 8550$ = ₹ 1,539.

Hence, the total amount of GST = ₹ 1,539.

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