Answer:
Step-by-step explanation:
Area of parallelogram = base * height
= 3 * 3
= 9 square units
4x7 is 28 and 4x6 is 24. :)
Complete Question
Calculating conditional probability
The usher at a wedding asked each of the 80 guests whether they were a friend of the bride or of the groom.
Here are the results:
Bride
:29
Groom
:30
BOTH : 20
Given that a randomly selected guest is a friend of the groom, find the probability they are a friend of the bride.
P (bride | groom)
Answer:
The probability is 
Step-by-step explanation:
The sample size is 
The friend of the groom are 
The friend of the groom are 
The friend of both bride and groom are
The probability that a guest is a friend of the bride is mathematically represented as

The probability that a guest is a friend of the groom is mathematically represented as

The probability that a guest is both a friend of the bride and a friend of the groom is mathematically represented as

Now
is mathematically represented as

Substituting values


Answer:AB=15 ,angle A=53.1°,angle B=36.9°
Step-by-step explanation:
AB=√(12^2+9^2)
AB=√(12x12+9x9)
AB=√(144+81)
AB=√(225)
AB=15
TanA=12/9
TanA=4/3
A=Tan(inverse)(4/3)
A=53.1° angle A=53.1°
angle B=180-(90+53.1)
angle B=180-143.1
angle B=36.9°