Answer: the variance of the winnings from this raffle is 162.7
Step-by-step explanation:
Given that;
X P( X=x ) xP(x) x²P(X)
10 0.095 0.95 9.5
20 0.045 0.9 18
50 0.020 1.0 50
100 0.010 1.0 100
0 0.830 0.0 0
TOTAL 1 3.85 177.5
therefore the variance will be;
Var(X) = [ ∑(x²) - [∑(X)]² ]
so we substitute
Var(X) = [ 177.5 - (3.85)² ]
= [ 177.5 - 14.8225 ]
= 162.6775 ≈ 162.7
therefore the variance of the winnings from this raffle is 162.7
It should take around 37 minutes.
Well since the for formula for these are b × h. We are gonna do...
5 × 9 which equals 45. So your answer is 45 cubic inches
hope this helps!
Answer:
70 ≥ (73 + 83 + 85 + 90 + 2x) / 6 ≥ 79
70 ≥ (331 + 2x) / 6 ≥ 79