Answer:
53.57%
Step-by-step explanation:
We have to calculate first the specific number of events that interest us, if at least 3 are girls, they mean that 2 are boys, therefore we must find the combinations of 3 girls of 5 and 2 boys of 3, and multiply that, so :
# of ways to succeed = 5C3 * 3C2 = 5! / (3! * (5-3)!) * 3! / (2! * (3-2)!)
= 10 * 3 = 30
That is, there are 30 favorable cases, now we must calculate the total number of options, which would be the combination of 5 people from the group of 8.
# of random groups of 5 = 8C5 = 8! / (5! * (8-5)!) = 56
That is to say, in total there are 56 ways, the probability would be the quotient of these two numbers like this:
P (3 girls and 2 boys) = 30/56 = 0.5357
Which means that the probability is 53.57%
Answer: Yes, they are equal
lets see how,
solve the given equation,
–3(0.15 – 0.2 + 0.25p)
Step 1: Inside the bracket solve the similar variables i.e. (0.15 - 0.2)
So it will become,
= -3 ( -0.05 + 0.25p )
Step 2: Multiply each term in the bracket by -3
So it will be,
((-3*-0.05 ) + (-3 * 0.25p))
= 0.15 - 0.75p
Hence 0.15 – 0.75p is equal to –3(0.15 – 0.2 + 0.25p )
Answer:
1
Step-by-step explanation:
the answer is 1
