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Anwesa Roy

· started a discussion

· 1 Months ago

Mathjax not visible (Question: 104277.0 )

Mathjax not visible. The fractions are not visible. Please look into the matter.

Question:
In a test consisting of 80 questions carrying one mark each, Arpita answers 65% of the first 40 questions correctly. What percent of the other 40 questions does she need to answer correctly to score 75% on the entire test?
Options:
A) 60
B) 80
C) 75
D) 40
E) None of these
Solution:

According to question = (x% of remaining 40 ques.)+ (65% of already done 40 ques) = 75 % of total 80 ques.

\(\frac{X}{100}\)× 40 + \(\frac{65}{100}\)  ×40 =  \(\frac{75}{100}\) ×80

\(\frac{40X+2600}{100}\)= \(\frac{6000}{100}\) 

40x + 2600 = 6000

40x = 3400

x = \(\frac{3400}{40}\)  = 85%

Knowledge Expert

· commented

· 1 Months ago

We fixed it. Team TR
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