In a drawer, there are 13 pairs of socks, 10 of which are white, and 10 t-shirts, 6 of which are white. If you randomly select one pair of socks and one t-shirt, what is the probability that both are white? Express your answer as a reduced fraction.

not enough information

step-by-step explanation:

we cannot know this, because the other students could have handed out 10 flyers, or they could have handed out 100. one way, the mean would go up, and another way, the mean would go down.

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204

investment b is an ordinary annuity with $3,909.64 in the account after one year.

step-by-step explanation: