Question 33250: I Have a few question hope you can help
1. the probability of picking a multiple of 5 from cards num 1 to 20
2. a bag has 2 red 7 yellow, 4 blue what are the prob.of getting a.picking a blue marble ,not picking a yellow, getting 2 blue.
3.when rollong two num. cubes what is the probability of getting sum of 4
4. 3 radios out of 75 are bad what is th empirical prob. of gettong a defect
5. if the empirical probability of a defect part is 1.5 percent how many defected parts would you predict there would be in a batch of 20,000 pieces
6.how ounces of cashews should be added to 38oz to make 4 pounds
Found 2 solutions by mukhopadhyay, longjonsilver:
Answer by mukhopadhyay(490)   (Show Source):
You can put this solution on YOUR website! 1. The probability of picking a multiple of 5 from cards num 1 to 20:
There are 4 cards from card number 1 to 20 that are multiple of 5;
So, the probability of picking a number which is a multiple of 5 is 4/20 = .2;
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2. a bag has 2 red 7 yellow, 4 blue what are the prob.of getting a.picking a blue marble ,not picking a yellow, getting 2 blue.
The question does not state the number of marbles to be drawn at a time. It is assumed one marble is picked at a time.
Total number of balls = 13;
Total number of blue marbles = 4;
Number of marbles other than yellow = 6;
a. Probability of picking a blue marble = 4/13;
b. Probability of picking a marble other than yellow = 6/13;
c. Probability of picking 2 blue marbles (one at a time)
= [4/13] = 1/13;
3.when rollong two num. cubes what is the probability of getting sum of 4
Total number of combinations = 36 (6*6);
Total number of combinations to have a sum of 4 = 3 (1,3; 3,1; 2,2)
Probability of getting sum of 4 = 3/36 = 1/12;
Answer by longjonsilver(2297)  (Show Source):
You can put this solution on YOUR website! 5,10,15,20...4 possibilities from 20 cards: P = 4/20 --> P=1/5
P(Blue) = 4/13
P(not yellow) = 2/13+4/13 = 6/13
P(getting 2 blue) assuming not replacing first marble = 4/13 * 3/12 = whatever that is
Roll 2 dice... 36 outcomes. How many add up to 4? Look at the following list of combinations, where order of numbers is "first dice" then "second dice":
1+3
2+2
3+1
so, 3 outcomes from 36 --> P(4) = 3/36 --> 1/12
P(defective radio) = 3/75 --> 1/25
1.5% is 1.5 out of 100
this means that 1.5 out of 100 are defective
so in 100, we expect 1.5 defective
so in 200, we expect 3 defective
so in 20,000 we expect 300 defective.
How many ounces is a pound? 16? If it is:
4 pounds is 64 ounces.
We have 38oz, so we need a further 26oz.
jon
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