Answer:
Step-by-step explanation:
A) License plates are made using 3 letters followed by 3 digits
If repitition is allowed we have
number of plates = ![(26)^3 (10)^3 =17576000](https://tex.z-dn.net/?f=%2826%29%5E3%20%2810%29%5E3%20%3D17576000)
Option B
Out of 10 members 6 can be selected in
10C6 =210
Option B
3 tax returns from 13 can be selected in
13C3 =286
Option D
Prob of taking 3 cherry from 11 cherries is
6C3/11C3=20/165=0.1212
Option B
Answer:
(b) 19% is a parameter, 22% is a statistic.
Step-by-step explanation:
-A parameter is defined as characteristic of a population under study.
In this case , the population is all cars manufactured and the characteristic of whiteness is exhibited by 19% of them.
#A statistic is a characteristic of sample.
-In this case the sample size is 100 and the statistic is 22% of them are white.
=>A statistic is usually taken or used as a representation of the entire population.
Check the picture below.
since the triangle is a 30-60-90 triangle, we can use the 30-60-90 rule.
now, we know half-side is "b", which is 7, meaning the length of a side in that hexagon is 7+7 or 14.
Since there are 6 sides the "perimeter", namely the sum of its sides is 14*6, or 84. The length from the center of the regular polygon to a side is the "apothem".
3 5/6
I think, I haven’t done this in a long time.
Answer:
Step-by-step explanation:
x=tan a +cot a
x²=tan²a+cot²a+2tan a×cot a
x²=tan²a+cot²a+2
x²-2=tan²a+cot²a
y=tan a-cot a
squaring
y²=tan²a+cot²a-2 tan a cota
y²=tan²a+cot²a-2
y²+2=tan²a+cot²a
equating
x²-2=y²+2
or x²-y²=4