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vodomira [7]
3 years ago
15

If a x b = 2a - 3b + ab, then 3 x 5+5 x 3 is equal to?

Mathematics
1 answer:
Reptile [31]3 years ago
3 0

Answer:

B 22

Step-by-step explanation:

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Customers at a gas station pay with a credit card (A), debit card (B), or cash (C). Assume that successive customers make indepe
Maurinko [17]

Answer:

Mean = 20

Variance = 16

Step-by-step explanation:

Solution:-

- Let X be the number of customers paying with a debit card.  X has the binomial distribution with n = 100 trials and success probability p = 0.2  

- In general, if X has the binomial distribution with (n) trials and a success probability of (p) then:

                 P[X = x] = n!/(x!(n-x)!) * p^x * (1-p)^(n-x)

                 for values of x = 0, 1, 2, ..., n  

                 P[X = x] = 0 for any other value of x.

- The probability mass function is derived by looking at the number of combination of x objects chosen from n objects and then a total of x success and n - x failures.  

- Or, in other words, the binomial is the sum of n independent and identically distributed Bernoulli trials.

                  X ~ Binomial( n = 100 , p = 0.2 )

- The mean of the binomial distribution is n * p = 20  

- The variance of the binomial distribution is n * p * (1 - p) = 16  

7 0
3 years ago
ABC and QRS are complementary angles. ABC=52, what is QRS?
dedylja [7]

Answer:

QRS=38

Step-by-step explanation:

90-52=38

6 0
2 years ago
I need help with this !!!!!
GenaCL600 [577]

Answer:

-48

Step-by-step explanation:

-6(8)=-48

5 0
3 years ago
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