Alab orders a shipment of 100 rats a week, 52 weeks a year, for experiments that the lab conducts. prices for each weekly shipment of rats follow the distribution below. how much should the lab budget for next year's rat orders assuming this distribution does not change. (hint: find the expected price.)

Then this is the expected price for the  weekly shipment of rats =13.25

Step-by-step explanation:

Suppose the price for the shipment of rats are as follow

price 10 12.50 15

and probability may be

0.2  0.3  0.5

then the expected value is equal to

=10* 0.2 + 12.50 *0.3 + 15 *0.5

=13.25

then this is the expected price for the  weekly shipment of rats

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

3-4

step-by-step explanation:

the answer is 3-4 because both 45 and 60 has a multiple of 15.

45/3=15

60/4=15

therefore the odds against selecting a red is 4-3