Answer:
284.4
Step-by-step explanation:
Divide all numbers by 1.5. example: (10)1.5(12)1.5(81.5= 284.444444 but I rounded it to 284. You're welcome
This problem is a combination of the Poisson distribution and binomial distribution.
First, we need to find the probability of a single student sending less than 6 messages in a day, i.e.
P(X<6)=P(X=0)+P(X=1)+P(X=2)+P(X=3)+P(X=4)+P(X=5)
=0.006738+0.033690+0.084224+0.140374+0.175467+0.175467
= 0.615961
For ALL 20 students to send less than 6 messages, the probability is
P=C(20,20)*0.615961^20*(1-0.615961)^0
=6.18101*10^(-5) or approximately
=0.00006181
18 chocolate cakes were made. 40(3)= 120 cakes in total. 15%=.15 .15(120)= 18
Use binomial distribution to find the answer.
P(9) = <span>
<span>0.3643
P (10) = </span></span><span>
<span>0.4840
sum of both is 0.483
edit, sum of both is 0.8483... i miss out the 8 the first time. typed too fast.</span></span>
Answer:
(3) D.
(4) A.
Step-by-step explanation:
hope this helps :3
if it did pls mark brainliest
