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1 year ago

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Five friends have access to a chat room. Is it possible to determine who is chattingif the following information is known? Eithe

r Kevin or Heather, or both, are chatting. Either Randyor Vijay, but not both, are chatting. If Abby is chatting, so is Randy. Vijay and Kevin are either bothchatting or neither is. If Heather is chatting, then so are Abby and Kevin. Explain your reasoning

2 answers:

saw5 [17]1 year ago

8 0

Answer:

Most likely somebody using multiple accounts!

Step-by-step explanation:

If Heather is chatting, then so are Abby and Kevin. Isn't that suspicious or did they plan this?

If Abby is chatting, so is Randy. Vijay and Kevin Also Suspicious

fenix001 [56]1 year ago

4 0

Answer:

Kevin and Vijay are chatting

Step-by-step explanation:

Consider: Kevin=k

Heather=h

Randyor=v

Vijay=v

Abby=a

The values or the variables can be =o if they are not chatting and =1 if they arre chatting, then:

k+h>=1

v+r=1

a=r

v=k

if h=1 then a=1 and k=1, then as a=r, r=1 and as v=k, v=1, but then v+r=2, which is not possible because v+r=, then we can fisrt conclude than h=0.

.As k+h>=1, and h=0, then k=1. As k=v, then v=1.

As v+r=1, and v=1, then r=0. As r=a, a=0

So in conclusion, a=0, r=0, v=1, k=1 and h=0, so Kevin and Vijay are chatting

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At the 0.10 level of significance the z table gives critical values of -1.645 and 1.645 for two-tailed test.

Step-by-step explanation:

We are given that the mean gross annual incomes of certified welders are normally distributed with the mean of $20,000 and a standard deviation of $2,000.

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Here, null hypothesis states that the mean income of welders is equal to $20,000.

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2 years ago

In 2001, a total of 15,555 homicide deaths occurred among males and 4,753 homicide deaths occurred among females. The estimated

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b.) If 4,753 homicide cases were recorded among Females of 144,984,000 population, then in every 100,000 Females, the number of homicides cases will become:

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2 years ago

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