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evablogger [386]
3 years ago
14

Margarita is 15 years older than Silvia the sum of their ages is 41

Mathematics
2 answers:
Len [333]3 years ago
5 0
26 subtract their ages and u get how old she is
Nimfa-mama [501]3 years ago
3 0
One of them is 13 and the other is 28
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An instructor who taught two sections of Math 161A, the first with 20 students and the second with 30 students, gave a midterm e
uranmaximum [27]

Answer:

<em>The answers are for option (a) 0.2070  (b)0.3798  (c) 0.3938 </em>

Step-by-step explanation:

<em>Given:</em>

<em>Here Section 1 students = 20 </em>

<em> Section 2 students = 30 </em>

<em> Here there are 15 graded exam papers. </em>

<em> (a )Here Pr(10 are from second section) = ²⁰C₅ * ³⁰C₁₀/⁵⁰C₁₅= 0.2070 </em>

<em> (b) Here if x is the number of students copies of section 2 out of 15 exam papers. </em>

<em>  here the distribution is hyper-geometric one, where N = 50, K = 30 ; n = 15 </em>

<em>Then, </em>

<em> Pr( x ≥ 10 ; 15; 30 ; 50) = 0.3798 </em>

<em> (c) Here we have to find that at least 10 are from the same section that means if x ≥ 10 (at least 10 from section B) or x ≤ 5 (at least 10 from section 1) </em>

<em> so, </em>

<em> Pr(at least 10 of these are from the same section) = Pr(x ≤ 5 or x ≥ 10 ; 15 ; 30 ; 50) = Pr(x ≤ 5 ; 15 ; 30 ; 50) + Pr(x ≥ 10 ; 15 ; 30 ; 50) = 0.0140 + 0.3798 = 0.3938 </em>

<em> Note : Here the given distribution is Hyper-geometric distribution </em>

<em> where f(x) = kCₓ)(N-K)C(n-x)/ NCK in that way all these above values can be calculated.</em>

7 0
3 years ago
<img src="https://tex.z-dn.net/?f=%20%5Chuge%5Ccolorbox%7Blightblue%7D%7Bwhat%20%5C%3A%20is%20%5C%3A%20multiverse%20%3F%7D%20" i
almond37 [142]

Answer:

HOPE THIS IS WHAT YOU ARD LOOK FOR

3 0
3 years ago
Read 2 more answers
WILL MARK BRAINLIEST ANSWER!!!
STatiana [176]

Answer:

7. D:61

8. A:57

9. A: 47

Step-by-step explanation:

Quesiton 7:

To find perimeter we add all the sides together.

x+2x+2x+5=145

Combine all the x's.

5x+5=145

To isolate the constants, subtract 5 from both sides.

5x=140

Now divide both sides by 5 to isolate the x.

x=28

The questions asks for the length of AC, so to find that we need to insert our new x.

AC= 2(28)+5

56+5=61

6 0
3 years ago
Find (f o g)(x) and (g o f)(x). g(x) = x + 5 ; f(x) = 2x.
Lana71 [14]

Answer:

The answers are

f

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Step-by-step explanation:

I search them on goggle..and that's the answer...

4 0
2 years ago
I WILL GIVE BRAINLIEST
nikdorinn [45]

Answer:

No. The data shows that it rains more than once in 5 of the 12 months shown. She says she wants it to rain less than an inch every month. And with such a small sample, a mean of 0.9 and a median of 0.7 could change drastically.

8 0
2 years ago
Read 2 more answers
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