Question

HELP 50 POINTS FOR ANSWERING

Answer 1

`\boxed{\sf {view \: explanation}}`

Explanation:

`\sf a) \ (maths+english )/(total)`

`\sf (20+11+39)/(100) =(70)/(100)`

`\sf b) \ (intersection \ of \ math \ and \ english )/(total)`

`\sf (11)/(100)`

`\sf b) \ (excluding \ intersection \ of \ math \ and \ english )/(total)`

`\sf (20+39)/(100) =(59)/(100)`

Answer 2

see below

Explanation:

P( math or english) = number of math or english / total

This would include the people that studied both (20+11+39)

= 70/100

P( math and english) = number of math and english / total

This is the people that studied both

= 11/100

P( math or english but not both) = number of math or english / total

This includes only the people that study one or the other but not both (20+39)

= 59/100