Let
be the set of all students in the <u>c</u>lassroom.
Let
and
be the sets of students that pass <u>p</u>hysics and <u>m</u>ath, respectively.
We're given




i. We can split up
into subsets of students that pass both physics and math
and those that pass only physics
. These sets are disjoint, so

ii. 9 students fails both subjects, so we find

By the inclusion/exclusion principle,

Using the result from part (i), we have

and so the probability of selecting a student from this set is

Answer:
y =
x - 6
Step-by-step explanation:
2x - 3y = 18 ( subtract 2x from both sides )
- 3y = - 2x + 18 ( divide terms by - 3 )
y =
x - 6
Answer:
13 cm
Step-by-step explanation:
Add up all of the sides and you should get 13.
3 + 3 + 3.5 + 3.5 = 13
Answer:
x=4
Step-by-step explanation:
