## H2 Physics and Math Discussion

Is there life after O/A-Levels? Definitely! How well a person does in tertiary education is correlated with job opportunities open to the person. Discuss issues pertaining to nstitutes of higher learning here.

### H2 Physics and Math Discussion

Hi guys, feel free to post any question on Physics and Math here. I'll try my best to help you answer the questions. Many students were caught off guard by the Mathematical Induction problem in the 'A' level exam last year. I hope it wil not happan again. P.S. I am not a full time tutor, just an engineer who is using stochastic process in my daily work and love to solve Math/Physics questions (I am more into Math than Physics)

violin_lover
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### Re: H2 Physics and Math Discussion

Post removed
Last edited by babyluvv on Sun May 20, 2012 11:19 pm, edited 1 time in total.

babyluvv
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### Re: H2 Physics and Math Discussion

i) probability that no camera is defective = (1-0.05)^20 = 0.3585
ii) probability that at most 2 cameras are defective = P(X=0)+P(X=1)+P(X=2) = 0.3585 + 20(0.05)(0.95)^19 + 20C2(0.05)^2(0.95)^18 = 0.3585 + 0.3774 + 0.1887 = 0.9246
iii) mean is 20*0.05 = 1; standard deviation is sqrt(np(1-p) )= 0.975

i) probability that exactly 12 cups of coffee were sold in 2 hours.
Average in 2 hours is 20 cups. Hence, P(X=12) = 0.01763

ii) probability that in an hour more than 3 cups of coffee are sold.
= 1- P(Y=0) - P(Y=1) - P(Y=2) - P(Y=3) = 0.01034

Feel free to PM me if you need any assistance :-)

violin_lover
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### Re: H2 Physics and Math Discussion

I welcome H3 Math too :-D

violin_lover
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### Re: H2 Physics and Math Discussion

Received too many email queries. I have decided to remove my info and contact :-). If you are a part time/full time tutor, please try to solve your own questions. My aim is to assist students (or parents whose kids are taking H2 Math)
Last edited by violin_lover on Sat Apr 07, 2012 11:04 pm, edited 1 time in total.

violin_lover
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### Re: H2 Physics and Math Discussion

Hi,

May I know how did you work out for the above answers? the detailed workings?

Thank you!

Belleza momma
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### Re: H2 Physics and Math Discussion

Belleza momma wrote:Hi,

May I know how did you work out for the above answers? the detailed workings?

Thank you!

Send me an email or leave your email contact here. It's hard to type symbol on the forum. I will scan it and email you.

violin_lover
GreenBelt

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### Re: H2 Physics and Math Discussion

You could try using latex.

whitecorp
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### Re: H2 Physics and Math Discussion

Ok, email sent !

Belleza momma
KiasuNewbie

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### Re: H2 Physics and Math Discussion

can i have the detailed working for above answer ??pls

mine email is colourchris@hotmail.com

Chris880817
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