In problem, solve the given differential equation by undeter- mined coefficients. y"y 2x sinx m: -mej- mri m2-i ye c, cosz+ csin y(ab)cos x ccxd)siny c=0 d: 2 2a+2d=0 4an 2b+2 c-o a=-2 p- cosx 9cicos x+ c2sinz 2 sin - xco5x + will give the 2. 0331 03 38 pe cbookpro

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?