Answer:
0.04845
Step-by-step explanation:
Probability that less than 7 but more than 4 bulbs from the sample are defective :
P(4 < X < 7) = P(x = 5) + P(x = 6)
Using the binomial probability formula :
P(x =x) = nCx * p^x * (1 - p)^(n - x)
From the question :
p = 0.2 ; 1 - p = 0.8 ; n = 11
P(x =5) = 11C5 * 0.2^5 * 0.8^6 = 0.03876
P(x = 6) = 11C6 * 0.2^6 * 0.8^5 = 0.00969
P(4 < X < 7) = P(x = 5) + P(x = 6)
P(4 < X < 7) = 0.03876 + 0.00969
P(4 < X < 7) = 0.04845
Answer: 5/16 (the first one)
s/80 the second one
Step-by-step explanation: it says the ratio for 7th grade simmers to all swimmers is 5:16 so that’s ur first box and it said there are 80 total swimmers so, 80 goes in the other one
Answer:
d
Step-by-step explanation:
Answer:
B. 40
Step-by-step explanation:
It looks like a 90-degree angle so...
90 - 30 = 60
60 - 20 = 40
40 would be your final answer.
$25 + $35x = $200
$35x = $175 (subtracted the 25)
x = 5 hours (divided the 35)
So you could rent the boat for 5 hours.