Answer:
The mean of X is 122.5 and the standard deviation is 7.9.
Step-by-step explanation:
For each adult, there are only two possible outcomes. Either they believe that the overall state of moral values is poor, or they do not believe this. The probability of an adult believing this is independent of other adults. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
Probability of exactly x sucesses on n repeated trials, with p probability.
The expected value of the binomial distribution is:
The standard deviation of the binomial distribution is:
In this problem, we have that:
So
The mean of X is 122.5 and the standard deviation is 7.9.
3^8 = <span>6561
3^9 = </span><span>19683
6581 x 19683 = </span><span>129533823
quite a big number</span>
2*1*1= 2 m^3 per chest
2 m^3 per chest* 18 chests= 36 m^3 total
Final answer: 36 m^3
Answer:
$2.90
Step-by-step explanation:
<u>Lets look at the information given:</u>
Scott made 3 necklaces
$14.40 is the cost for both the beads and pendants for all 3 necklaces
$5.70 was the cost of just beads for all 3 necklaces
Each necklace has 1 pendant
The first step to solving this equation is subtracting the cost of the beads from the total cost for the necklaces:
$14.40 - $5.70= $8.70
Now we know that cost for the 3 pendants for all 3 necklaces was $8.70, but we need to find how much EACH pendant costs. To find out, we simply divide the total cost for all 3 pendants by 3:
$8.70 ÷ 3 = $2.90
So each pendent costs $2.90