17. 40% of Ram's marks is equal to 20% of Rahim's
marks which is equal to 30% of Robert's marks
If Robert's marks is 80, then find the average marks
of Ram and Rahim.
(1) 60
(2) 70
(3) 80
(4) 90
(5) None of these
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Step-by-step explanation:
Given, 40% of Ram's marks = 20% of Rahim's marks = 30% of Robert's marks.
Given, marks of Robert = 80
30% of 80 = 30/100 * 8 = 24
Given, 40% of Ram's marks = 24.
=> Ram's marks = (24 * 100)/40 = 60
Also, 20% of Rahim's marks = 24
=> Rahim's marks = (24 * 100)/20 = 120
Average marks of Ram and Rahim = (60 + 120)/2 = 90.
∴ Option d
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