In a class 80% have passed english,70% passed Hindi 10%
didnot passed either. If 144 students passed both. What is
the total strength of the class.
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Answer Posted / avinash
let t = total no of students.. then
students who passed one or both subjects,
n(e U h) = n(e) + n(h) - n(e intersection h)
=> t = 0.8t + 0.7t - 144
=> t = 1.5t - 144
students who failed both subjects is 10% i.e. 0.1t
=>t-n(e U h) = 0.1t,
=>t -(1.5t - 144) = 0.1t
=>t- 1.5t- 0.1t = -144
=> -0.6t = -144
=>t = 240
| Is This Answer Correct ? | 98 Yes | 6 No |
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