2.25/3=0.75.....0.75*2= 1.5. 1.5 is your answer.
Answer:
969
Step-by-step explanation:
173 + 212 + 185 + 197 + 202 = 969
Answer:
10 tickets = 30$
20 = 60$
30 = 90$
40 = 120$
50 = 150$
Answer:
1.43%
Step-by-step explanation:
we have that we can solve it by means of binomial, in this case m = 25. Also the probability of head is 50%. we need to know when it falls 7 times, therefore x = 7
the formula is:
P (x) = mCx * p ^ x * q ^ (m-x)
we know that p is 0.5 therefore q is equal to 0.5, replacing:
P (7) = 25C7 * 0.5 ^ 7 * 0.5 ^ (25-7)
P (7) = 25! / (7! * (25-7)!) * 0.5 ^ 7 * 0.5 ^ (25-7)
P = 0.0143
that is, the probability is 1.43%
