In a game at an amusement park, a player can win 20 points, 25 points, or 30 points. the probability of winning these points is given in the table. points probability 20 0.6 25 x 30 y if jenny expects to win 22.5 points by playing the game once, the value of x is and the value of y is

(x, y) = (0.3, 0.1)

Step-by-step explanation:

The sum of the probability numbers must be 1. That is, ...

... 0.6 + x + y = 1.0

The expected value must be 22.5. That is, ...

... 20·0.6 +25x +30y = 22.5

These two equations can be written as the system of equations ...

5x +5y = 2 . . . . . . the first equation in standard form5x +6y = 2.1 . . . . . the second equation with 5 factored out (after subtracting 12)

Subtracting the first of these equations from the second gives ...

... (5x +6y) -(5x +5y) = (2.1) -(2)

... y = 0.1

Putting this in the very first equation above, we have ...

... 0.6 +x +0.1 = 1.0

... x = 0.3 . . . . . . . . . subtract 0.7

Answer for 2: his profit would be $2.88 explanation: you have to first multiply 72 and 0.12 together to get $8.64 once you do that you know how much money the shopkeeper made from selling the candy bars individually. so you have to do 8.64-5.76=2.88 hope that ; )answer for 3: yeah i’m sorry i have no idea what number 3 is. i’m sorry i couldn’t with that.

step-by-step explanation:

12 minutes