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January 13th, 2013, 04:48 PM   #1
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simple probability (two questions)

I'm not so great with probability, so I used a tutoring website that gives live help that the library pays for. The guy was ok but rudely kicked me off the session due to limited time. He told me that two questions on my sheet were wrong.. Here they are

3. If a letter is picked at random from the set of 26 letters that make up the English alphabet. What is the probability that the letter selected is contained the word "bake" or the word "math"? I gave 1/26 but he marked that wrong..

4. The Grimaldis have three children born in different years.
A) Draw a tree diagram or list a sample space to show all the possible arrangements of boy and girl children in the Grimaldi family.
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January 14th, 2013, 02:32 PM   #2
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Re: simple probability (two questions)

Quote:
Originally Posted by flipsy618
I'm not so great with probability, so I used a tutoring website that gives live help that the library pays for. The guy was ok but rudely kicked me off the session due to limited time. He told me that two questions on my sheet were wrong.. Here they are

3. If a letter is picked at random from the set of 26 letters that make up the English alphabet. What is the probability that the letter selected is contained the word "bake" or the word "math"? I gave 1/26 but he marked that wrong..

4. The Grimaldis have three children born in different years.
A) Draw a tree diagram or list a sample space to show all the possible arrangements of boy and girl children in the Grimaldi family.
3. The sentence seems to be missing a word. Did you mean "is contained in the word"? If so you the answer is 4/26.

4A) ggg, ggb, gbg, bgg, gbb, bgb, bbg, bbb.
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January 14th, 2013, 04:53 PM   #3
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Re: simple probability (two questions)

Hello, flipsy618!

Quote:
3. A letter is picked at random from the set of 26 letters that make up the English alphabet.
What is the probability that the letter selected is contained in the word BAKE or the word MATH?

There are seven choices of letters in

The probability is:



Quote:
4. The Grimaldis have three children born in different years.
A) Draw a tree diagram or list a sample space to show all possible
[color=beige]. . [/color]arrangements of boy and girl children in the Grimaldi family.

[color=beige]. . . [/color]

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