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  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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Topic review (newest first)

Al-Allo
2012-12-18 14:08:50

It's not written in English ... ^^ Even, it's only exercises, nothing more lol

bobbym
2012-12-18 11:16:56

Hi Al-Allo;

Both of those are binomial distribution problems. What is the name of the book?

Al-Allo
2012-12-18 10:29:13

oh yes you're right. i noticed i missed one, so thanks ! finaly, my book wasnt right ! thanks you two !

bob bundy
2012-12-18 10:01:24

hi Al-Allo

Welcome to the forum.

Stay on-line.  I'm just working it out.

1 5 10 10 5 1

It should be 10/32

hhhtt, hhtht, hhtth, hthht, hthth, htthh, thhht, thhth, ththh, tthhh


Bob

Al-Allo
2012-12-18 09:55:28

Omg im happy to know that because in my book it says its 4/32 ?!? And here is another one, what is the prob that it will land 3 times on head and 2 times on tails ? I got 9/32 but in my book it says 8/32 ?!? There is always 1 of difference, we could say it's an error ? Thanks !

anonimnystefy
2012-12-18 09:49:55

5/32 is correct.

Al-Allo
2012-12-18 09:30:58

I have just a little question about this : If I toss a coin 5 times, what is the probability of getting 4 tails and 1 head ? I think the answer is 5/32 ? Is this any good ? THanks

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