Events A and B are mutually exclusive, with P(A) = 0.65 and P(B) = 0.14. What is P(A or B)?
A. 0.091
B. 0.215
C. 0.51
D. 0.79
Answers
Answer 1
Answer:
Answer: 0.79, D
Work: The value of the probability of (A or B) when A and B are mutually exclusive is equal to P(A) + P(B). There is no need to subtract the P(A and B) because the events are mutually exclusive which means that they never overlap and P(A and B) is therefore equal to 0. The answer is then 0.65 + 0.14 which equals 0.79, which is the answer.
west palm beach, florida, gets rain about 16 percent of the time. on how many days out of 400 can residents of west palm beach predict they will get rain?
Answers
Remember that 16%=16/100=0.16
If it rains 16% of the time, out of 400 days...
400*0.16=64days
you can predict they'll get 64days of rain
Answer=64days
Do a proportion. 16/100=x/400. 100x=6400. 6400/100= 64. The answer is 64 days
Matthew used 1/5 of a box of flour for cooking and 3/4 of the remainder to make bread. The rest of the flour was packed equally into 5 containers. What fraction of the total amount of flour was in each container?
Answers
Matthewused 1/5 of a box of flour for cooking. => Let’s convert this to decimals. => 1/5 = 0.2
Next, ¾ of the flour remainder is for the making bread => ¾ = .75
The rest are equally divided into 5 containers. Now, we need to find the totalamount of flour used in each container. => Let’s add first the first 2 fractions converted to decimals. => 0.2 + .75 = 0.95 => 1.00 – 0.95 = 0.05 => 0.05 / 5 = 0.01 => total amount of flour in each container.
If you would like to know what fraction of the total amount of flour was in each container, you can calculate this using the following steps:
used 1/5 of a box of flour for cooking: 1 - 1/5 = 5/5 - 1/5 = 4/5 remained 3/4 of the remainder to make bread: 4/4 - 3/4 = 1/4 1/4 of 4/5 = 1/4 * 4/5 = 1/5 of the box of flour remained
packed equally into 5 containers: 1/5 / 5 = 1/5 * 1/5 = 1/25 of the box of flour was put into each container
Result: 1/25 of the total amount of flour was in each container.
What is the least number that has 4 odd factors that are all the same? Each factor is greater than 1 and can have only 1 itself as factors
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I'm not quite sure what you mean. the factors can't be 1. the factors have to be odd. they have to be the same. offhand i would say 3*3*3*3 would be equal to 9*9 = 81. the number 81 has 4 odd factors that are all the same. can't be 1 because 1 doesn't counts as a factor. a prime number has 2 factors. 1 and itself. every number has a factor of 1 and itself.
What is 0.04 times 7.6? Using ur work
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Well, you'll multiply regularly, then move da decimals to the left 3 times, because if you add the amount of decimal places in 0.04 and 7.6, (2 + 1), it equals 2, but so 0.04 times 7.6 = 0.304 I hope I helped! =D
Please help me. Very confused. due tomorrow!!
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these triangles are identical, bc they have the same angles. (top angle is the same, and two bottom angles are same for all 4 of them). if identical = true, then the bases are ratios. therefore ab+cb : cb = 22 : 2.75 ab+cb : 5 (cb) = 8 ab+5 : 5 = 8 ab+5 = 40 ab = 35
How to find the area of a shaded region if there are two circles inside a square, the area of the square is 60 ( on side is 6 and the other is 10)?
Answers
if it's breadth is 6 then the circles should have the diameter 6 and radius = 3 now subtract the area of both circles from the area of rectangle area of circle = π r² = 3.14 x (3)² = 3.14 x 9 = 28.26 this is area of one circle so area of both circles = 2 x 28.26 = 56.52 now the area of shaded region = area of rectangle - area of both circles area of shaded region = 60 - 56.52 = 3.48 <------ANSWER