Question

there are 100 students in the class . out of each 60 student drink tea , 50 students drink coffee and 30 students drink both tea and coffee. if one student drawn at random then find probability that the studen drink either tea or coffee or both.​

Answer 1

the probability is 150 upon hundred

Answer 2

Answer:

4/5

Step-by-step explanation:

100 student all

only 60 student drink tea means

n(A) = 60/100

and 50 student drink cofee

n(B). = 50/100

both 30

p(A^B) = 30/100

now

p(A~B). = n(A) + n(B) - p(A^B)

= 60/100 + 50/100 - 30/100

= 4/5 is right answer