Answer:
18/19 = About 95%
Step-by-step:
If only six are noble gases, 108 are not noble gases.
114-6= 108
So, the probability of not picking a noble gas is 108 out of 114. This simplifies to 18/19 which is about 95%.
see explanation below
Step-by-step explanation:
1500 × 3 × 20 ÷ 100
$900
28÷1.5=18.67
meaning that more, than 17 discs can be placed in the box.
BOX