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Savatey [412]
4 years ago
13

Five Questions may be answered true or false. The pass mark is 3 marks each question is worth one mark. 400 people just guess th

e answers.
a What is the probability of getting all 5 questions right.
b What is the probability of passing?
c How many people would you expect to pass.
Mathematics
2 answers:
lesantik [10]4 years ago
8 0

Answer:

there is only 1 probability of getting all questions right.

ser-zykov [4K]4 years ago
6 0

Answer:

there is only 1 probability of getting all questions right.

Step-by-step explanation:

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Nezavi [6.7K]

Answer:

the answer should be (3,-2)

7 0
3 years ago
3(a+b)=19 if a=6, then a+b=?
aniked [119]

Hello!

In a really simple way, 3 times our answer is 19. We can just divide to find it.

19/3= 6 1/3

Anyway, it might be nice to solve the equation for b. If a=6, then b has to be 1/3, but let's check.

18+3b=19

3b=1

b=1/3

Therefore, a+b= 6 1/3

I hope this helps!

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denis-greek [22]

Answer:

asap

Step-by-step explanation:

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4 years ago
Which would you use to compare 10 / 12 and 2 / 5 a common numerator or common denominator?
BartSMP [9]

We can compare 2 fractions by means of the cross multiplication method. In our case, we have

since 50 is greater than 24 then 10/12 is greater than 2/5:

\frac{10}{12}>\frac{2}{5}

3 0
1 year ago
Mr. Sprocket borrows $3,500 from his bank to buy a used car. The loan has a 7.4% annual simple interest rate. If it takes Mr. Sp
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the correct answer is $4018


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