Answer : 5/22
A deck of cards contains 6 black cards and 6 red cards. The first card drawn is not replaced before drawing the second card.
Total number of outcome of cards = 12
Probability( any event)= favorable outcomes divide by total number of outcomes
Probability of selecting black card = 
The drawn card is not replaced . so 11 cards left . In that 11 cards, 5 black cards because one black card is already chosen
Probability of selecting another black card = 
Probability of selecting a black card followed by another black card =
= 
=

That's the simplest form of 15/35. You can use
3/7 to get other equivalent fractions by multiplying the numerator and denominator by the same number. Other examples are
9/21, 6/14, and 12/28.
Hope this helps!
Answer: You will need to multiply them by 5
Step-by-step explanation: 120÷24=5. So you would need to multiply all ingredients by 5 to get enough for 120 people.
15 I may be wrong but If I am please provide more information.