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AURORKA [14]
3 years ago
6

Harriet spins this 6 colour spinner and flips a coin.

Mathematics
1 answer:
LenaWriter [7]3 years ago
4 0

Answer: 9%

Step-by-step explanation:

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Amy makes the following statement:
almond37 [142]
60%= 6/10= 3/5
10%= 1/10
1/10*3/5=3/50
The probability that it will snow and Amy will be late for school is 6%
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3 years ago
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Rivika used the last four digits of her telephone number,1048, followed by its prime factorization to create her email password
oksano4ka [1.4K]

Answer: I'm pretty sure I can help, just give me like 3 minutes..

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3 years ago
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Evaluate the expression: a(b – c) if a = -8, b = 12, and c = 4
Llana [10]

Answer:

-64

Step-by-step explanation:

a(b - c)

a = -8

b = 12

c = 4

So, you'd plug in those numbers:

-8(12 - 4)

You'd start within the parenthesis's, so:

(12 - 4), which equals (8)

-8(8)

= -64

8 0
2 years ago
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A new medical test provides a false positive result for hepatitis 2% of the time that is a perfectly healthy subject being teste
Oxana [17]
Given that X <span>be the number of subjects who test positive for the disease out of the 30 healthy subjects used for the test.

The probability of success, i.e. the probability that a healthy subject tests positive is given as 2% = 0.02


Part A:

</span><span>The probability that all 30 subjects will appropriately test as not being infected, that is the probability that none of the healthy subjects will test positive is given by:

</span>P(X)={ ^nC_xp^x(1-p)^{n-x}} \\  \\ P(0)={ ^{30}C_0(0.02)^0(1-0.02)^{30-0}} \\  \\ =1(1)(0.98)^{30}=0.5455
<span>

Part B:

The mean of a binomial distribution is given by

</span>\mu=np \\  \\ =30(0.02) \\  \\ =0.6
<span>
The standard deviation is given by:

</span>\sigma=\sqrt{np(1-p)} \\ \\ =\sqrt{30(0.02)(1-0.02)} \\ \\ =\sqrt{30(0.02)(0.98)}=\sqrt{0.588} \\  \\ =0.7668
<span>

Part C:

This test will not be a trusted test in the field of medicine as it has a standard deviation higher than the mean. The testing method will not be consistent in determining the infection of hepatitis.</span>
5 0
3 years ago
A square is 3 centimeters by 3 centimeters. What are the dimensions of a similar square with sides that are three times that siz
Serjik [45]

Answer:9 cm by 9cm

Step-by-step explanation: 3*3=9

5 0
3 years ago
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