z equals -1 because 8 time negative one equals negative 8 plus 8 equals 0
Each of the members must raise at least $69.46.
To start they need to raise $552.50. However, they have already raised 12% of it. They only need to raise 88% of it.
552.50 x 0.88 = 486.2
Divide the remaining amount by 7 to determine how much each individual must raise.
486.2 / 7 = 69.46
Multiply $530.40 by 3/4. You get the equation

If you simplify this, you get the solution of $397.80
$397.80
Answer: A probability of 1 means the event is certain to happen. A probably of zero means the event is certain not to happen.