Nidhi scored 62 marks in mathematics, 70 in English, 74 in Science.
Posted on 15-12-2022
Ques - Nidhi scored 62 marks in mathematics, 70 in English, 74 in Science. What will be her score in social science so that her total marks be 68%? (SSC CPO 2018, 14.03.2019 Shift-2)
(a) 67
(b) 65
(c) 66
(d) 68
Solution - Nidhi's marks in Mathematics = 62
Nidhi's marks in English = 70
Nidhi's marks in Science = 74
Let,
Nidhi's marks in Social Science = x
Total marks of Nidhi in all four subject = 62 + 70 + 74 + x
= 206 + x
Maximum marks in all four subject = 400
A/c
Her score in social science,
206 + x = 400 × (68/100)
206 + x = 272
x = 272 - 206
x = 66
Hence, Nidhi's marks in Social Science will be 66.
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