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Maths & Physics Help

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sonali:
ok bt hw do u get to d ans 26/27
i still dnt get it

astarmathsandphysics:
1 - 1/3x1/3x1/3.
1/3x1/3x1/3 is the probability that the goalie saves all the shots, so the question must be, "what is the pronanility that the goali does not save all the shots?"

sonali:

--- Quote from: astarmathsandphysics on November 02, 2008, 01:35:32 pm ---1 - 1/3x1/3x1/3.
1/3x1/3x1/3 is the probability that the goalie saves all the shots, so the question must be, "what is the pronanility that the goali does not save all the shots?"

--- End quote ---
yeah got it thxfully
another sum need yr help
srry bt plz do help
its easy bt still i am unable to figure it out
q. a normal pack of 52 cards is shuffled and three cards picked at random. calculate d probability tht all three cards are picture cards.
n ya require notes on d topic the angle between d line n a plane

astarmathsandphysics:
There are 12 picure cards

Prob of 1srt being picture card =12/52
prob of 2nd being picture card =11/51
prob of third being picture card =10/50
answer =12/52x11/51x10/50=1320/132600=11/1105

Assuming no replacement.

if they are repaced each time it is 12/52x12/52x12/52=27/2197

will try and put up some  of the notes youwant tonight.

sonali:
srry bt d ans still does not tally
d ans according to d book is 0.010(3dp)

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