Answer:
Step-by-step explanation:
Discussion
9 with a sister
13 with a brother
7 with neither.
The total is 29 so you are counting some siblings twice. There are 29 - 25 students that have both, so 4 students have both.
P(brother and sister) = 4/25
P(brother and sister) = 0.16
Answer
P = <u>0.16</u>
Answer:
60 pascals
Step-by-step explanation:
Five times a variable equals the variable to the third power
2y is in the first equation so if you change 0.5x+y=17 to y=17-0.5x and then double it to 2y=34-x, you can substitute and find x. And then you can find out y.
How to find x:
0.5x+y=17
y=17-0.5x
2y=34-x
3x-2y=8
3x-34-x=8
<u>x=21</u>
How to find y (with previous info.)
x=21
3x-2y=8
3*21-2y=8
63-8=2y
55=2y
<u>27.5=y</u>
200
If the number is divisible by 5, then the last digit should be either 5 or 0.
First digit is fixed.
Second digit can be 10 ways.
Third digit can be 10 ways.
Fourth digit can be 2 ways.
So total number of digits 1 x 10 x 10 x 2 = 200
