Answer:25 girls or 25% and 75 or 75% boys
Step-by-step explanation:
there are 20 girls plus 5 is 25, so 25 girls and 75 boys.
this might not be the right answer if this is on a test don't use it but if it's a practice question you can.
Answer:
74 days
Step-by-step explanation:
The proportion left after d days is ...
p = (1/2)^(d/100)
When that proportion is 60%, we have ...
.60 = .50^(d/100)
log(.60) = (d/100)log(.50) . . . . . take logarithms
100·log(.60)/log(.50) = d ≈ 73.697 ≈ 74 . . . days
Just plug in! We can get f(6) by just substituting f(5) into the generic f(n) formula.
We can then plug in f(6) again to obtain f(7). You end up getting 0.3*3.6 = 1.08
solution:
p=ncx ,. p^x.Q^{n-x}\\
where p and q are the probabilities of success and failure respectively.\\
in this case p =0.10 and Q=0.90\\
ncx= \frac{n!}{x!(n-x!)}\\
p(exactly one defect in a random sample of 5)\\
=5(0.10)^1(0.90)^4=0.3281\\
p(no. defects in a random sample of 5)\\
=1(0.90)^5=0.5905
