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Rama09 [41]
3 years ago
12

mr morris needs two students to help with a demonstration for her class of 12 girls and 14 boys. She randomly chooses two studen

ts. What is probability that she choose two girls
Mathematics
1 answer:
IRISSAK [1]3 years ago
6 0
The class starts out with 26 students, of whom 12 are girls and, perhaps unlike Mr Morris, are sure of it. The probability of the first random choice being a girl is 12/26. If successful, there are now 25 students left, of whom 11 are girls. The probability of a girl on the 2nd random choice is 11/25. The probability that BOTH random choices are successful is (12/26) x (11/25). That's (132/650), or about 20.31% (rounded).
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48 people attended the Sunday matinee to watch a film. .Three over 8 of the people went to see a romantic comedy. .One over six
never [62]

Answer:

22 people saw an horror movie

Step-by-step explanation:

Total people who attended the Sunday matinee = 48

People who saw romantic comedy = 3/8 of 48

= 3/8 × 48

= (3*48) / 8

= 144 / 8

= 18 people

People who saw action movie = 1/6 of 48

= 1/6 × 48

= 48/6

= 8 people

People who saw horror movie = x

Total people who attended the Sunday matinee = People who saw romantic comedy + People who saw action movie + People who saw horror movie

48 = 18 + 8 + x

48 = 26 + x

Subtract 26 from both sides

48 - 26 = 26 - 26 + x

22 = x

x = 22 people

22 people saw an horror movie

7 0
3 years ago
5/x^2-5x - x/5x-25 simplify
Debora [2.8K]
\bf \cfrac{5}{x^2-5x}-\cfrac{x}{5x-25}\implies \cfrac{5}{x(x-5)}-\cfrac{x}{5(x-5)}\impliedby \stackrel{LCD}{5x(x-5)}
\\\\\\
\cfrac{25-x^2}{5x(x-5)}\implies \cfrac{5^2-x^2}{5x(x-5)}\implies \cfrac{\stackrel{\textit{difference of squares}}{(5-x)(5+x)}}{5x(x-5)}
\\\\\\
\cfrac{\boxed{-\underline{(x-5)}}(5+x)}{5x\underline{(x-5)}}\implies \cfrac{-(5+x)}{5x}\implies \cfrac{-5-x}{5x}
7 0
3 years ago
Will mark you brailiest PLZ ANSWER! Evaluate the expression. 2 to the power of 4 · 3²
Pavel [41]

Answer:

144

Step-by-step explanation:

You need to know the Order of Operations. First you do 2 to the power of 4 (because it's the E in PEMDAS) which is 2*2*2*2 which equals 4, 8, 16, then you would do three squared which is 3*3 which equals 9. Multiply (M in PEMDAS) 16 by 9 which would come out to 144 or how I would multiply those two numbers is 9*10 + 9*6 or 90 + 54 with a final answer of 144.

3 0
3 years ago
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Simplify the product using the distrbutive property 3(h-5)
koban [17]
To multiply you have to distribute. 3(h-5) will be 3h-3(5) which is 3h-15. So the answer is 3h-15
6 0
3 years ago
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