Answer: 125/242
Step-by-step explanation: Probability is favorable outcomes over all outcome, since there were 250+234 total outcome, and 250 were favorable (girls), then the probability is 250/250+234=250/484=125/242
Answer:
a) 0.4571
b) How many sedentary people are needed in the study to achieve 80% power? = 229
Step-by-step explanation:
Answer: uhhhh
Step-by-step explanation:
Answer:
560x^3y^4.
Step-by-step explanation:
The (r+1)th term of (a + b)^r = nCr a^(n-r) b^r
We want the fifth term so r = 5 - 1 = 4:
(4 + 1)th term = 7C4 x^(7-4) (-2y)^4
= 35x^3 16y^4
= 560x^3y^4.
Answer:
20
Step-by-step explanation:
because 35 divided by 7 is 5, so 4 cars must be 5 x 4 = 20
