Probability chapter Maths

D e a r S t u d e n t 1 . T o t a l n u m b e r o f b a l l s = 100 P r o b a b i l i t y o f d r a w i n g a r e d b a l l = \frac{1}{10} P r o b a b i l i t y o f d r a w i n g a w h i t e b a l l = \frac{6}{10} P r o b a b i l i t y o f d r a w i n g a b l a c k b a l l = \frac{3}{10} P r o b a b i l i t y o f d r a w i n g a r e d b a l l = \frac{N u m b e r o f r e d b a l l s}{T o t a l n u m b e r o f b a l l s} \frac{1}{10} = \frac{N u m b e r o f r e d b a l l s}{100} N u m b e r o f r e d b a l l s = \frac{100}{10} = 10 P r o b a b i l i t y o f d r a w i n g a w h i t e b a l l = \frac{N u m b e r o f w h i t e b a l l s}{T o t a l n u m b e r o f b a l l s} \frac{6}{10} = \frac{N u m b e r o f w h i t e b a l l s}{100} N u m b e r o f w h i t e b a l l s = \frac{600}{10} = 60 P r o b a b i l i t y o f d r a w i n g a b l a c k b a l l = \frac{N u m b e r o f b l a c k b a l l s}{T o t a l n u m b e r o f b a l l s} \frac{3}{10} = \frac{N u m b e r o f b l a c k b a l l s}{100} N u m b e r o f b l a c k b a l l s = \frac{300}{10} = 30 R e g a r d s

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