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Fofino [41]
3 years ago
5

HELP HELP!!!! YOU WILL GET BRAINLIEST!! PLEASE!!!

Mathematics
1 answer:
LiRa [457]3 years ago
5 0
Um idk sorry lol that’s way to hard for me
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Suppose that 20° of boys opted for mathematics and 40% of girls opted for mathematics. What is the probability that a student op
ankoles [38]

Answer: 30%

Step-by-step explanation:

Let A be the probability of a student opting for mathematics - it consists of either boy opting for mathematics or girl opting for mathematics. As there is "or" we need to sum these probabilities.

P(A) = P(B)* P(M|G) + P(G)*P(M|G)

P(A) = \frac{1}{2} * \frac{20}{100} + \frac{1}{2} * \frac{40}{100}

P(A) = 3/10 = 0.3

=> 30%

5 0
3 years ago
What is the area of a rectangle of 5/9 m in length and 7/8 m in width
Andru [333]

Answer:

35/72 m^2

Step-by-step explanation:

Rectangle Formula: l*w=Area

Switch the variables with the numbers given:

\frac{5}{9} *\frac{7}{8} =Area

Multiply the top and bottom:

5*7 = 35

9*8 = 72

35/72 = Area

6 0
3 years ago
Ella has $115. She wants to purchase a cell phone for $53 and spend the rest on music. Each music download cost $9. Write and so
Mumz [18]

Answer: 6.89


Step-by-step explanation:

9x+53>= 115

Subtract 53 from both sides

9x+(53-53) >115-53

9x>62

Divide both sides by 9.

9x÷9>62÷9 = 6.889


3 0
3 years ago
Math question no Guessing and Please show work
Nataly [62]
What's the question?
6 0
3 years ago
All vectors and subspaces are in RnR n. Mark each statement True or False. Justify each answer.
Leto [7]

Answer:

a. True

b. True

c. False

d. False

e. False

Step-by-step explanation:

The matrix with orthonormal column must be in square for that it forms orthogonal matrix. Every orthonormal set of non zero vector is linearly independent. This statement is correct because there is linear combination of non zero vectors.

4 0
3 years ago
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