P(at least 2 students have the same birthday)= 1- P(no 2 students have the same birthday)
Because P(A)=1-P(A'), where A is an event, and A' the complement of that event.
P(no 2 students have the same birthday)=
think of the problem as follows. We have an urn of balls, numbered from 1 to 365 (the number of the days of the year.
What is the probability of picking 56 different numbered balls, with replacements?
The first one can be any of the 365
the second any of 364 (since one selection has already been made)
the third any of the 363
.
.
and so on
the 56th selection is one of 310 left
Answer:
First, distribute the minus sign across the second set. So you have:
x - y + 1 - x - y + 1
Now, we combine like terms:
x-x=0
-y-y=-2y
1+1=2
So we have -2y+2
Hope that helps.
Answer:
37.7; B, 36 pi; C
Step-by-step explanation:
Hello!
<u>The formula for finding circumference of a circle is 2πr:</u>
In that case, we can just substitute 6 meters for our radius.
6 × 2π = 12π
12 × 3.14 (about π) = 37.68
That's about 37.7 (when rounded.)
Thusly, the closest option is 
.
<u>The formula for finding the area of a circle is πr²:</u>
In that case, we can just substitute 6 meters for our radius. (again.)
6² = 36
36 × π = 36π
Therefore, 
is our answer.
<em>brainliest please and thanks (:</em>
<em />
Hope this helps!
<em />
<u>Part 1)</u> Use the fact that there are 12 inches in a foot
a) How many inches tall is a 7 foot basketball player?
we know that
1 foot=12 inches
so by proportion
therefore
<u>the answer Part 1a) is</u>
Part b) If a yard is a 3 feet long, how many inches are in a yard?
we know that
1 yard=3 feet
1 foot=12 inches
so
Convert 3 feet to inches
by proportion
therefore
<u>the answer Part 1b) is</u>
<u>Part 2) </u>At the farmer's market two pounds of peaches cost $4.20 How much will five pounds cost?
by proportion
therefore
<u>the answer Part 2) is</u>
<u>Part 3) </u>Janice mother gave her a ten dollars bill to buy five pounds each of bananas and apples at the grocery store. When she got there she found that bananas were 80 c per pound and apples were $1.40 per pound.
Did Janice's mother give her enough money? If so, should she receive any change? If not, how much more money does she need?
we know that
<u>Find the cost of the bananas</u>
<u>Find the cost of the apples</u>
Sum the cost of the bananas and the cost of the apples
------> Janice's mother didn't give her enough money
She needs more money
She needs-------> 
therefore
<u>the answer part 3) is</u>
She needs 
more
Answer:the first one is 16 and the second one I don’t know and it’s kinda hard to see
