Question

class of 100 students 60 drink tea 50 drink coffee and 40 drink both.
student is selected at random find the probability that the student takes.

$i) \: \: atleast \: one \: of \: the \: two \: drinks$
$ii) \: only \: one \: of \: two \: drinks$

please Help
​

Answer 1

1. 0.7

2. 0.3

this is the answer