Probabilities are used to determine the chances of an event.
- The probability that the first contestant is a boy is 1/2
- The probability that the second contestant is a boy, if the first is a boy is 9/19
- The probabilities are not independent
The given parameters are:
<u>(a) Probability that first contestant is a boy</u>
This is calculated as:
This gives
<u>(b) Probability that the second contestant is a boy, if the first is a boy</u>
This is calculated as:
We subtracted 1, because the first contestant (a boy) is no longer part of the selection.
So, we have:
<u>(c) Independent probabilities</u>
The probabilities are not independent, because when a contestant is selected, the number of contestant is reduced by 1.
And this will affect the probability of the next selection.
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<h3>
<u>Answer the following questions :-</u></h3>
Raja is junk seller. He sells many things. Here is given the list of junk.
Check the Raja's rate list and solve the following questions.
<h2>
<u>Solutions :-</u></h2>
1. How much money will you pay to Raju for 20 kg of newspapers?
<u>∴ We need to pay Rs.100 for buy 20 kg of newspapers. </u>
2. What is the cost of 5 kg Iron?
<u>∴ The cost of 5 kg iron is Rs.50.</u>
3. What is the cost of 9 kg Plastic?
<u>∴ The cost of 9 kg plastic is Rs.72. </u>
4. What is the cost of 7 kg Brass?
<u>∴ The cost of 7kg brass is Rs.350.</u>
Answer:
41.41 would be the answer
<u>0.0931</u><u> is the </u><u>probability </u><u>that at least 10 pay in cash.</u>
What is a probability simple definition?
The ratio of the number of outcomes in an exhaustive set of equally likely outcomes that produce a given event to the total number of possible outcomes.
Using binomial distribution with n= 15, and p = 0.40,
P(8<X<12) = P(X=9)+P(X=10) + P(X=11)
= 0.0612+0.0245+0.0074
= 0.0931
Therefore,0.0931 is the probability that at least 10 pay in cash.
Learn more about probability
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6^-2 , 6^3/6^5 , 6^-9 • 6^7. I believe these are the expressions that are equivalent to 1/36.