pls answer the probability question
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132/144
=11/13
P(good pen)=no of good pen/no of total pens
=11/13
P(good pen)=no of good pen/no of total pens
EnchantedGirl:
but the answer is given as 11/12
oops sorry i wrote 13 by mistake.... its 12
ok
no doubt why i make silly mistakes in maths
how did you get 144
132+12
ur doing this to find the total no of pens
ok ..thanks
and to find probability of a good pen u need to divide 132/total pens
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P(good pen) = number of good pen/ total pens=132/144=11/12
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