Answer :
0.2322
Step-by-step explanation:
Proportion, p of those who used e - ticket to get boarding pass = 112 / 280 = 0.4
p = 0.4
1 - p = 1 - 0.4 = 0.6
Number of samples, n = 8
P(x = 4)
Using the binomial probability formula :
P(x =x) = nCx * p^x * (1 - p)^(n - x)
P(x = 4) = 8C4 * 0.4^4 * 0.6^4
P(x = 4) = 70 * 0.0256 * 0.1296
P(x = 4) = 0.2322432
P(x = 4) = 0.2322
. 66 the 6 keeps going on and on so you can just write. 66 with a line over the second 6.
the the negative angle is -(2π-π/4)= -\frac{7 \pi }{4}
To find the price per unit, divide the total price by the number of units.
2.12/25=0.08
5.09/72=0.07
Brand B is the better buy. It is cheaper per unit.
