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Mathematics 19 Online
zarkam21:

Help

zarkam21:

1 attachment
zarkam21:

@Vocaloid

zarkam21:

@Vocaloid

zarkam21:

@Vocaloid

Vocaloid:

count up the outcomes where: one of the dice is 3, and the total sum is 7

zarkam21:

2 and 6

zarkam21:

@Vocaloid

Vocaloid:

consider the outcomes where one die is 3 AND the sum is < 7

Vocaloid:

the total number of outcomes obeying both these conditions is ___

zarkam21:

um well there are only 2 3's

Vocaloid:

first, look at all of the sums that are less than 7 then, from those, look at the sums where one dice is 3

Vocaloid:

|dw:1506648290462:dw|

zarkam21:

15 are less than 7

Vocaloid:

|dw:1506648296613:dw|

Vocaloid:

good, now look at the sums where one of the dice is 3

Vocaloid:

|dw:1506648324597:dw|

zarkam21:

6?

Vocaloid:

not quite

zarkam21:

2 and 1

Vocaloid:

how many numbers are overlapped by the black and brown regions?

zarkam21:

5?

Vocaloid:

good so your final answer is 5/36

zarkam21:

that's lowest term right

Vocaloid:

yes

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