Answer:

Step-by-step explanation:
There are 52 cards in a standard deck, and there are 4 suits for each card. Therefore there are 4 twos and 4 tens.
At first we have 52 cards to choose from, and we need to get 1 of the 4 twos, therefore the probability is just

After we've chosen a two, we need to choose one of the 4 tens. But remember that we're now choosing out of a deck of just 51 cards, since one card was removed. Therefore the probability is

Now to get the total probability we need to multiply the two probabilities together

X=$7 | 1 Ticket= x | 1 Ticket = $7
Answer:
Unknown weight is 11.5kg.
Step-by-step explanation:
Square weight is 4kg. 4×5 =20.
Round weight is 2.5kg. 2×4+2×2.5=13.
Left pan is 4+3×2.5=4+7.5=11.5.