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In an examination 80% students passed in mathematics 72% in Science and 13% failed in both the subjects is 312 students passed in both the subjects find the total number of students appeared in the examination give only answer not explanation |
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Answer» Answer: 480 Step-by-step EXPLANATION: Let total number of students who APPEARED in the EXAM be X Number of students who passed in Math = 80% of x = 0.8·x Number of students who passed in Science = 72% of x = 0.72·x Number of students who failed in both = 13% of x = 0.13·x Number of students who passed in both = 312 ⇒ Total students = 0.8·x + 0.72·x + (0.13·x - 312) ⇒ 0.8·x + 0.72·x + (0.13·x - 312) = x ⇒ 1.65·x - x = 312 ⇒ 0.65·x = 312 ⇒ x = 480 Hence, Total number of students who appeared in the examination = 480 ꧁Mark as Brainliest answer꧂ |
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