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kolbaska11 [484]
3 years ago
5

Can someone please help me with this one? Oh and in the boxes I need to put a number NOT a check mark.

Mathematics
1 answer:
kari74 [83]3 years ago
3 0
Grade 7 : Yes = 2 , No = 3
Grade 8 : Yes = 1 , No = 4
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Suppose that you randomly draw one card from a standard deck of 52 cards. After writing down which card was drawn, you replace t
34kurt

Answer:

The probability is 0.0775

The expected value is 4.75 clubs

The standard deviation is 1.8875 clubs

Step-by-step explanation:

The variable X follows a binomial distribution, because we have n identical and independent events (19 cards) with a probability p of success and 1-p of fail (there is a probability of 1/4 to be club and 3/4 to be diamond, heart or spade). Then, the probability that x of the n cards are club is:

P(x)=\frac{n!}{x!(n-x)!}*p^{x}*(1-p)^{n-x}\\P(x)=\frac{19!}{x!(19-x)!}*0.25^{x}*(0.75)^{19-x}

So, the probability P of drawing at least 8 clubs is:

P = P(8) + P(9) + P(10) + ... + P(18) + P(19)

Replacing, the values of x, from 8 to 19, on the equation above, we get:

P = 0.0775

Additionally, the expected value E(x) and standard deviationS(x) for this distribution is given by:

E(x)=np = 19(0.25) = 4.75

S(x)=\sqrt{np(1-p)} =\sqrt{19(0.25)(0.75)} =1.8875

8 0
3 years ago
A supermarket randomly gives each shopper a free two liter bottle of cola during the Saturday shopping hours. The supermarket se
Musya8 [376]
You can use a graph and put all the information on there
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The ratio of the ages of two children is 2:3. If the younger child is 4 years old, how old is the other child?
vladimir1956 [14]
So if the ratio is 2:3, then the younger child would represent the 2. so it would be 2:3 is 4:x. Thereby, the answer would be 6, because of proportions. To check, simplify 4:6, and you would get 2:3.
4 0
3 years ago
Read 2 more answers
How to solve this proof
pishuonlain [190]

sorry do not know the answer'


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3 years ago
A parking garage has 8 levels. Each level has parking spaces for 78 cars. How many cars can park in the garage at one time?
mafiozo [28]
624 cars can park in the garage at one time.

this is because 78 x 8 = 624
5 0
3 years ago
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