Question

More probability help please? Got half-way through sorta, stuck on 3

Answer 1

Err, I think i did 1 right, but i'm shaky on #2

Answer 2

did you put those numbers in? do they add up to 100%?

Answer 3

I did not put those numbers in. I assumed that they didn't add up to 100 because they overlapped. Since the students did more than one activity, they became a larger percentage. At least that's how i perceived it, they might have bungled the problems

Answer 4

your venn is in error

Answer 5

AandB = b+e

if AnB is 5% and e is 3% then b is not 5%

Answer 6

35% went camping, abde
57% went to the beach bcef
20% went to the waterslides. defg

a+b+d+e + b+c+e+f + d+e+f+g we have duplicates, adjust it by

-15% went camping & to the beach, -be
- 8% went to the beach & to the waterslides, -ef
- 5% went camping & to the waterslides -de

a + b+c +d +f+g we are missing a value, adjust it by

+3% went to all three. +e

a + b+c +d +e +f+g

less then 100% are accounted for, the remainder did not attend the 3 events at all.