A bag has 2 blue marbles, 3 red marbles, and 5 white marbles. Which events have a probability greater than 5 ? Chec
1 answer:
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Answer:
0.74
Step-by-step explanation:
The standard deviation of a data set is the sqaure root of the variance, so first we must find the variance. The equation for variance is:
σ² =
x = number in the data set
xbar = median of the data set
n = number of terms
Plugging in the given values, the equation for the variance of this number set is:
σ² =
Solving:
=
=
σ² = 0.546875
Since the standard devianation is the sqaure root of the variance, we'll sqaure 0.546875:
= 0.73950997288745
= 0.74 (rounded)
hope this helps!
d=2r, r = 2.5
A= πr2
Area = 3.14 ⋅ 2.5 ⋅ 2 = 15.7