Question

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In a certain college, 40% of the senior class students are taking Physics, 30% are taking calculus and 10% are taking both. If 40 students are enrolled in the senior class, how many students are taking neither Physics nor calculus?

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Answer 1

Answer:

mujhe waise message mat kiya kar

ok

Explanation:

i want to count the 10% that take both courses only once,

so I will include them in the 40% that take Physics,

but not in the 30% that take calculus.

Therefore I have counted 40% + (30% - 10%) = 60%

of the students.

The problem tells me that

60% of 40 students are enrolled in these 2 courses.

.6%2A40+=+24

Therefore 40+-+24+=+16

16 students are enrolled in neither of these courses