Question

HELP 50 POINTS FOR ANSWERING

Answer 1

Answer:

see below

Step-by-step 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

Answer 2

Answer:

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

Step-by-step explanation:

$\sf a) \ \frac{maths+english }{total}$

$\sf \frac{20+11+39}{100} =\frac{70}{100}$

$\sf b) \ \frac{intersection \ of \ math \ and \ english }{total}$

$\sf \frac{11}{100}$

$\sf b) \ \frac{excluding \ intersection \ of \ math \ and \ english }{total}$

$\sf \frac{20+39}{100} =\frac{59}{100}$