Write and solve an equation.

mary and alice are playing a card game. mary has 21 points. she has 9 points less than alice.

solve for p.

how many points, p, does alice have?

enter your answer in the box.
$$ points

The equation is P=21+9, the answer is Alice has 30 points.

N(2.2, 0.3)
Percent between 1.9 and 2.2
In a Normal distribution 68% of the data lies within 1 standard deviation of the mean. This is one standard deviation to the left and right TOGETHER.
1.9 is one standard deviation to the left of the mean which represents 1/2 of the 68% or 34% or .34