Kevin has an equal number of dimes, nickel and quarters in his piggy bank. He randomly picks a coin, replaces it, and picks anot
her coin. What is the probability that the sum of the two coins is at least 30cents?
1 answer:
Say he has 2 dimes (D), 2 nickels (N), and 2 quarters (Q). There are 3 * 3 = 9 choices for what he can pull out. How many will give at least 30 cents?
Q and N, N and Q, Q and D, D and Q
That's 4 out of 9. So, the probability is 4/9.
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Answer:
r=-10
Step-by-step explanation:
Plug in the value of t into the equation.
r=3t-1; t = -3
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r= -10
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The appropriate choice is ...
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