Question 1172791
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Hi  
100 NBs: 36Y, 42B, 22R
What is the probability that the second customer would buy? :
1. A yellow notebook? 
1st either buys a different color or a yellow one as well
P = {{{(64/100)(36/99)}}} + {{{(36/100)(35/99)}}} = {{{(2309 + 1260)/9900}}} = .3605
2. A red notebook? 
1st either buys a different color or a red one as well
P = {{{(78/100)(22/99)}}} + {{{(36/100)(35/99)}}}={{{(1716 + 1260)/9900}}} = .3006
3. A blue notebook if the first customer bought yellow notebook?
P(1st Y and 2nd B) = {{{(36/100)(42/99)}}} = {{{(1512)/9900}}} .1528
Wish You the Best in your Studies.