Question

Maria is to select one number from the set
at random.
​
​Consider the following three events.
​
​Event
: The selected number is an even number.
Event
: he selected number is a multiple of
.
Event
: The selected number is a multiple of
.

Part A: List the outcomes that are in event
or in event
but not in both events.
​
​Part B: List the outcomes that are in both events
and
but not in
.
​
​
Part A
Part B
Drag & Drop the answer
626262
636363
646464
686868
696969
666666
606060
616161
656565

Answer 1

Assuming the sample space is {60,61,62,63,64,65,66,68,69}, A = evens = {60,62,64,66,68}, B = multiples of 3 = {60,63,66,69}, C = multiples of 9 = {63}.

- Part A (in A or B but not both = A Δ B): {62,63,64,68,69}
-> 626262, 636363, 646464, 686868, 696969

- Part B (in B and C but not in A = (B ∩ C) \ A): {63}
-> 636363