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AnnZ [28]
2 years ago
14

The sum of two numbers is twenty-five.One number is five less than the other number. Find the larger number

Mathematics
1 answer:
djverab [1.8K]2 years ago
3 0
The larger number is 30.

Set up your equation.

x + y = 25

The question tells us one number is 5 less than the other.

The equation now becomes
x -5 = 25

Add 5 to each side to isolate x.

x=30
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The Wilson family had 5 children. Assuming that the probability of a child being a girl is 0.5, find the probability that the Wi
Dafna11 [192]

Answer:

0.813

0.500

Step-by-step explanation:

Use binomial probability.

P = nCr p^r q^(n−r)

where n is the number of trials,

r is the number of successes,

p is the probability of success,

and q is the probability of failure (1−p).

In this problem, n = 5, p = 0.5, and q = 0.5.

"At least 2 girls" means r = 2, 3, 4, or 5.

Or, we can use the complement.

P(at least 2 girls) = 1 − P(at most 1 girl)

P(at least 2 girls) = 1 − P(r=0 or r=1)

P(at least 2 girls) = 1 − ₅C₁ (0.5)¹ (0.5)⁵⁻¹ − ₅C₀ (0.5)⁰ (0.5)⁵⁻⁰

P(at least 2 girls) = 1 − 5 (0.5) (0.5)⁴ − 1 (1) (0.5)⁵

P(at least 2 girls) = 1 − 6 (0.5)⁵

P(at least 2 girls) ≈ 0.813

"At most 2 girls" means r = 0, 1, or 2.

P(at most 2 girls) = P(r=0, r=1, or r=2)

P(at most 2 girls) = ₅C₀ (0.5)⁰ (0.5)⁵⁻⁰ + ₅C₁ (0.5)¹ (0.5)⁵⁻¹ + ₅C₂ (0.5)² (0.5)⁵⁻²

P(at most 2 girls) = 1 (1) (0.5)⁵ + 5 (0.5) (0.5)⁴ + 10 (0.5)² (0.5)³

P(at most 2 girls) = 16 (0.5)⁵

P(at most 2 girls) = 0.500

4 0
3 years ago
What is the value of the fourth term in a geometric sequence for which a=15 and r= 1/3
Andreyy89

Answer:

Step-by-step explanation:

hello :

the n-ieme term is : An=A1×r^(n-1)

A1 the first term       r : the common ratio

in this exercice : A1 =15        r = 1/3      n = 4

A4=15×(1/3)^(4) =15×4^4 =3840    

6 0
3 years ago
HELP HELP HELP PLSSS
FromTheMoon [43]

Answer:

option. c. 720°

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5 0
2 years ago
Read 2 more answers
Work out $216 as a percentage of $600
dusya [7]

Answer:

36%

Step-by-step explanation:

Put it into a fraction:

216/600

Next divide:

216/600= 0.36

Turn the decimal into a percentage:

0.36 = 36%

216 as a percentage of 600 is equal to 36%.

3 0
3 years ago
Read 2 more answers
Each day at lunchtime, at least 53 people buy food from a food truck. Using the variable pp, an inequality that represents that
Dahasolnce [82]
P ≥ 53.
p (the number of people) is at least (so, greater than or equal to) 53
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3 years ago
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