Question

Question #1
50 students total.
12 students travelled by car only
7 students travelled by bus only
5 students travelled by car and walked,but did not use a bus
10 students travelled by bus and walked,but did not use a car
3 students used all three forms of travel

I drew a Venn diagram.

Two students are chosen at random from all 50 students.
- Find the probability that
a) Both students walked
b) only one of the students walked


Question #2
What does (dA)/(dr) mean in the surface area of cylinder the problem?

Answer 1

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