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IgorLugansk [536]
2 years ago
7

There are 60 pupils who joined the Math Quiz Competetion. 40 were boys and 20 were girls. During the Awarding ceremony, it was f

ound out that 20% of the boys and 15% of the girls won and received prizes. How many received prizes?
Please Answer In English
No link Kailangan ko na po ngayon!! :)​
Mathematics
1 answer:
Pavlova-9 [17]2 years ago
6 0

Answer:

8 pupils received prices

Step-by-step explanation:

20% of 40 = 8 (8 boys)

15% of 20 =3  (3 girls)

8+3 = 11

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The probability that a student uses Smarthinking Online Tutoring on a regular basis is 0.31 . In a group of 21 students, what is
Ivenika [448]

Answer: 0.0241

Step-by-step explanation:

This is solved using the probability distribution formula for random variables where the combination formula for selection is used to determine the probability of these random variables occurring. This formula is denoted by:

P(X=r) = nCr × p^r × q^n-r

Where:

n = number of sampled variable which in this case = 21

r = variable outcome being determined which in this case = 5

p = probability of success of the variable which in this case = 0.31

q= 1- p = 1 - 0.31 = 0.69

P(X=5) = 21C5 × 0.31^5 × 0.69^16

P(X=5) = 0.0241

4 0
3 years ago
How do you solve this system of equation?<br> 2x+4y=-4<br> 3x + 5y =-3
Annette [7]

Answer:

x = 4

y = -3

Step-by-step explanation:

We can use substitution, elimination, or graphically.

Step 1: Rearrange first equation

2x + 4y = -4

2x = -4 - 4y

x = -2 - 2y

Step 2: Rewrite systems of equations

x = -2 - 2y

3x + 5y = -3

Step 3: Substitution

3(-2 - 2y) + 5y = -3

-6 - 6y + 5y = -3

-6 - y = -3

-y = 3

y = -3

Step 4: Find <em>x</em> using <em>y</em>

2x + 4(-3) = -4

2x - 12 = -4

2x = 8

x = 4

Graphically:

Use a graphing calc and analyze where the 2 lines intersect.

5 0
3 years ago
Math question for 10 points plus brainliest!
Phoenix [80]

Answer:

It would've been more difficult to solve and doing it as shown in EX:2 it's a way easier method to use and remember.

3 0
3 years ago
It’s either A or B but idk, i’ll give brainliest :)
forsale [732]

Answer:

Actually it's A.

Step-by-step explanation:

3 0
3 years ago
Solve for a: 3a+11&gt;5<br> Which graph shows the solutions?
Alexxandr [17]

Answer:

a > -2.

Step-by-step explanation:

3a + 11 > 5

Subtract 11 from both sides:-

3a > 5 - 11

3a > -6

a > -2

6 0
3 years ago
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