The senior class is made up of 500 students: 300 boys and 200 girls. what is the probability of choosing a boy if the person is selected at random? 2/3 2/5 3/5

you didn't give me the choices, so i will just give you the graph so you can look at your choices and choose the right one.

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92