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svetlana [45]
3 years ago
15

60 points!!! ASAP A store hands out 900 reward cards. Customers scan their cards in the store to find out what reward they recei

ve. The probability that a customer receives a $25 gift card is 19. How many customers receive a $25 gift card?
how many customers receive a $25 gift card.
Mathematics
2 answers:
zheka24 [161]3 years ago
5 0

Answer:

100

Step-by-step explanation:

Expected no. = n × p

900 × 1/9

100

diamong [38]3 years ago
3 0

Answer:

100 customers

Step-by-step explanation:

Note that when you say "The probability that a customer receives a $25 gift card is 19", I assume you mean 1/9, not 19 because probability cannot exceed 1.

There are 900 reward cards in total, which means 900 customers have a chance to receive a reward. Out of these 900 customers, 1/9 of them receive a $25 gift card, so in order to find how many receive a gift card, we do:

(1/9) * 900 = 100

Thus, 100 customers receive a $25 gift card.

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United Blood Services is a blood bank that serves more than 500 hospitals in 18 states. According to their website, a person wit
Anna11 [10]

Answer:

a) 0.06 = 6% probability that a person has both type O blood and the Rh- factor.

b) 0.94 = 94% probability that a person does NOT have both type O blood and the Rh- factor.

Step-by-step explanation:

I am going to solve this question treating these events as Venn probabilities.

I am going to say that:

Event A: Person has type A blood.

Event B: Person has Rh- factor.

43% of people have type O blood

This means that P(A) = 0.43

15% of people have Rh- factor

This means that P(B) = 0.15

52% of people have type O or Rh- factor.

This means that P(A \cup B) = 0.52

a. Find the probability that a person has both type O blood and the Rh- factor.

This is

P(A \cap B) = P(A) + P(B) - P(A \cup B)

With what we have

P(A \cap B) = 0.43 + 0.15 - 0.52 = 0.06

0.06 = 6% probability that a person has both type O blood and the Rh- factor.

b. Find the probability that a person does NOT have both type O blood and the Rh- factor.

1 - 0.06 = 0.94

0.94 = 94% probability that a person does NOT have both type O blood and the Rh- factor.

6 0
2 years ago
{x + 3y =- 5<br> {9x + 3y = 3
LiRa [457]

Answer:

1. y-intercept(s):

(0,−53)

x-intercept(s):  

(−5,0)

2. x-intercept(s):

(13,0)

y-intercept(s):

(0,1)

Step-by-step explanation:

7 0
3 years ago
if 2 binders of the same size take up 3 inches on the shelf how much space will be needed for 28 of these binders?
Anna [14]

Answer:

84

Step-by-step explanation:

28x3=84

I hope i did that right

please give me Brainliest you dont have to tho

7 0
2 years ago
What do the following two equations represent?<br> · Y-3 = 2(2-3)<br> · y + 5 = 2(2 + 1)
solong [7]

Answer: A

Y-3 = 2(2-3) y=1

y−3=2(2−3)

Step 1: Simplify both sides of the equation.

y−3=2(2−3)

y+−3=−2

y−3=−2

Step 2: Add 3 to both sides.

y−3+3=−2+3

y=1

Step-by-step explanation: y + 5 = 2(2 + 1) y+5=2(2+1)

y=1

8 0
3 years ago
I need help I need this answer asap
lesya [120]
P= s+t+r
p - t - r =s
S = p-t-r
8 0
3 years ago
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