With n tosses, there are a total of 2^n possible outcomes. We need 15 of theses to be heads.
Since the tosses are random, we want to count the ways to have exactly 15 of them being heads. That will be C(n,15) ways to pick which tosses are heads.
The probability will be given by:
C(n,15)/2^n=0.0148
At this point we use various values of n until we get the correct probability.
n=18⇒0.003112793
n=19⇒0.007392883
n=20⇒0.014785767
n=21⇒0.025875092
Answer:
n=20
Answer:
$2.95 per duck
Step-by-step explanation:
To figure out the price per duck, we need to divide the money paid by the amount of ducks. Let x be the price per duck.
23.60/8=x
Divide them.
2.95=x
The price per duck is $2.95.
Answer:
52 i think
Step-by-step explanation:
Answer:
655
Step-by-step explanation:
this feels like elementary school maths
