Mean = np = 60(0.7) = 42
Standard deviation = sqrt(npq) = sqrt(60(0.7)(0.3)) = 3.55
Answer:
Step-by-step explanation:
Points: A, C, E, B, D, F
Line: AB
Line segment: AC, CE, CD, DF, DB
Planes: P, M
Rays: CA, DB
Angles: <ACE=90,< CDF= 90
Parallel lines: line w and line t are parallel to each other
Perpendicular lines: EC is perpendicular to AD and FD is perpendicular to CB
Answer:
7/15
Step-by-step explanation:
7 boxes out of 10 contain $20. Therefore 3 boxes do not have $20 bills.
The probability of picking a bag with a $20 bill
= 7/10
The probability of picking another bag with $20 bill
= (7-1)/(10-1)
= 6/9
The probability of getting two $20 bills.
= 7/10 × 6/9
= 42/90
= 7/15
Try combining the numbers with like terms, like 5x^2 and -11x^2. Then I will help you out.
