Question 1063164
2.  6C3*5C2*4C2 =20*10*6=1200.
3.===M======W====total
BE== 5======10=====15
not==5======10=====15
total==10====20=====30
Probability of a man is 1/3+probability has brown eyes=1/2- probability of both =1/6
2/3. What doesn't work is not a man and doesn't have brown eyes.  That is 1/3, or 10/30, lower right, and what remains is 2/3.
4.P z>2.75 is small by empirical rule, between .13% and 2.5%, and it is 0.003, or 0.3%
5.Between 2 and 3 hours is between 1 and 3 sd s above the mean.
Probability =0.1573.