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Author Archives: Anonymous

Flip a coin 6 times and 2 heads are obtained. In how many di…

Flip a coin 6 times and 2 heads are obtained. In how many different ways can this occur?

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Two discrete random variables X and Y have a joint probabili…

Two discrete random variables X and Y have a joint probability function f(x,y) given in the following table.        f(x,y) y=0 1 2 x=1 0.30 0.12 0.18 2 0.20 0.12 0.08  Find the probability P(X+Y>2).

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Put digits  1, 2, 3, 4 and 5 in a random order to form a 5-d…

Put digits  1, 2, 3, 4 and 5 in a random order to form a 5-digit number.    What is  the probability of getting an even number?   

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A football team will play one game with each of other six te…

A football team will play one game with each of other six teams.  The team won four games and lost twice.  In how many different ways can this happen?

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Six different presentations have been scheduled in six time…

Six different presentations have been scheduled in six time slots:   8:00-9:00, 9:00-10:00, 10:00-11:00, 11:00-12:00, 2:00-3:00, and 3:00-4:00.   Suppose you are allowed to attend four presentations.  How many different choices do you have if you attend exactly four presentations? 

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Which type of blood cell is primarily responsible for fighti…

Which type of blood cell is primarily responsible for fighting infection?

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Which disorder is associated with iron-poor blood?

Which disorder is associated with iron-poor blood?

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What are the two types of passive immunity?

What are the two types of passive immunity?

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Which blood vessel carries oxygen-rich blood from the lungs…

Which blood vessel carries oxygen-rich blood from the lungs to the heart?

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Which of the following are the major ABO blood types?

Which of the following are the major ABO blood types?

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