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# maths MC

Eric,Betty,Tracy and Jack sit randomly at a square table. What is the probability that Eric sits opposite to Tracy?

A 1/3

B 1/6

C 1/8

D 1/12

l want clear step...

thx..

### 3 Answers

- Audrey HepburnLv 71 decade agoFavorite Answer
Probability for Eric to sits opposite to Tracy

= 4 X [1/4 X (1/3)]

= 1/3

So, the answer is A

It is because there are 4 choices for Eric to choose a seat.

Once Eric has chosen a seat, Tracy will have 1/3 chance to choose a seat opposite to Eric.

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- 1 decade ago
Probability for Eric to sits opposite to Tracy

= 4 X [1/4 X (1/3)]

= 1/3

So, the answer is A

It is because there are 4 choices for Eric to choose a seat.

Once Eric has chosen a seat, Tracy will have 1/3 chance to choose a seat opposite to Eric.

Assume that Eric sit in Seat 1, tracy must sit in Seat 3

so the answer is 1/4*1/3*2*2=1/3

*2 means they can change the seat and sit in seat2 and seat4

Source(s): me,me,me- Login to reply the answers

- 1 decade ago
Assume that Eric sit in Seat 1, tracy must sit in Seat 3

so the answer is 1/4*1/3*2*2=1/3

*2 means they can change the seat and sit in seat2 and seat4

Source(s): me- Login to reply the answers