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The average age of 3 boys is 15 years. If their ages are in ratio 3:5:7, what is the age of the youngest boy?
A9 years
B12 years
C15 years
D18 years
A batsman scores 80 runs in his 10th innings and increases his average by 4 runs. What is his new average?
A40
B44
C48
D52
A bag contains 3 red balls and 5 green balls. One ball is drawn at random. What is the probability that it is red?
A3/8
B5/8
C3/5
D1/2
A sphere has a radius of 3 cm. What is its volume in terms of pi?
A12*pi cm³
B36*pi cm³
C48*pi cm³
D72*pi cm³
Convert 0.375 into a fraction in its simplest form.
A3/8
B3/5
C7/16
D11/30
Find the simple interest rate per annum if Rs. 500 yields Rs. 100 interest in 4 years.
A4%
B5%
C6%
D8%
A trader allows a 15% discount on the marked price of an item. If the marked price is Rs. 1200, what is the selling price?
ARs. 980
BRs. 1020
CRs. 1050
DRs. 1080
What is the simple interest on Rs. 4000 at 6% per annum for 3 years?
ARs. 600
BRs. 720
CRs. 800
DRs. 840