For a red marble you have 4 points and a blue you have 7, therefore the R(number of red marble) and B( blue marbles)
the answer is gonna be :{4r+7b}
Hope this help
Answer: (A) 1 followed by hundred zeros
Also equal to 10 to the one-hundredth power
10^100
Answer:
She will need to sell about 28 or 27 sweaters per month. It's between the two. Hope i helped :D
Step-by-step explanation:
Answer:
a) the probability of A students study for more than 10 hours per week
P(X>10) = 0.117
b) The probability that an student spends between 7 and 9 hour
P(7<x< 9) = 0.9522
Step-by-step explanation:
Step(I):-
Let 'X' be random variable of the normal distributed with a mean of 7.5 hours and standard deviation of 2.1 hours
mean of the Population is = 7.5 hours
standard deviation of the Population = 2.1 hours
![Z = \frac{x-mean}{S.D}](https://tex.z-dn.net/?f=Z%20%3D%20%5Cfrac%7Bx-mean%7D%7BS.D%7D)
Z = 1.1904
The probability of A students study for more than 10 hours per week
P(X>10) = 0.5-A(Z₁) = 0.5 -A(1.1904) = 0.5 - 0.3830 = 0.117
Step(ii):-
Put x=7
![Z = \frac{7-7.5}{2.1}= -0.238](https://tex.z-dn.net/?f=Z%20%3D%20%5Cfrac%7B7-7.5%7D%7B2.1%7D%3D%20-0.238)
put x=9
![Z = \frac{9-7.5}{2.1} = 0.7142](https://tex.z-dn.net/?f=Z%20%3D%20%5Cfrac%7B9-7.5%7D%7B2.1%7D%20%3D%200.7142)
The probability that an A student spends between 7 and 9 hour
P(7 < x< 9) = A(9) - A(7)
= 0.7142 +0.238
= 0.9522