Answer:
23, 32, 69
Step-by-step explanation:
3 numbers x, y, z
z = 3x
y = x + 9
x+y+z=124
x + (x + 9) + 3x = 124
5x + 9 = 124
5x = 115
x = 23
y = 32
z = 69
check: 23 + 32 + 69 = 124
Answer:
Mean of original test scores is 88.5
Mean of test scores , with three marks added to each score is 91.5
The mean of the test score with three marks added to each score is higher than the original mean of score is increased by three .
Explanation : <em>h</em><em>o</em><em>p</em><em>e</em><em> </em><em>i</em><em>t</em><em> </em><em>w</em><em>o</em><em>r</em><em>k</em><em>s</em><em> </em><em>o</em><em>u</em><em>t</em><em> </em><em>!</em><em>!</em>
Consider these numbers in turn.
1. 60. This number is composite, because 60=2·2·3·5. Acoording to the rule given in task for this number you can have such possibilities:
- 2 stacks with 30 towels at each;
- 3 stacks with 20 towels at each;
- 4 stacks with 15 towels at each;
- 5 stacks with 12 towels at each;
- 6 stacks with 10 towels at each;
- 10 stacks with 6 towels at each;
- 12 stacks with 5 towels at each;
- 15 stacks with 4 towels at each;
- 20 stacks with 3 towels at each;
- 30 stacks with 2 towels at each.
2. 29 is prime number, because 29=1·29 (has only two trivial divisors). Then you cannot choose numbers of stacks and towels according to the given rule.
3. 37 is prime number, because 37=1·37 (has only two trivial divisors). Then you cannot choose numbers of stacks and towels according to the given rule.
4. 42=2·3·7 is composite number. Acoording to the rule given in task for this number you can have such possibilities:
- 2 stacks with 21 towels at each;
- 3 stacks with 14 towels at each;
- 6 stacks with 7 towels at each;
- 7 stacks with 6 towels at each;
- 14 stacks with 3 towels at each;
- 21 stacks with 2 towels at each.
The probability that he or she owns a credit card given that the student is a freshman is 0.63.
<h3>How to calculate the probability?</h3>
Number if freshman with credit card = 38
Total number of freshman = 60
Therefore, the probability that he or she owns a credit card given that the student is a freshman will be:
= 38/60
= 0.63
Therefore, the probability that he or she owns a credit card given that the student is a freshman is 0.63.
Learn more about probability on:
brainly.com/question/24756209
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