Question

5. Twenty-five sixth-grade students entered a math contest consisting of 20 questions. The student who

Answer 1

Answer:

two coins are flipped:

• if dime land heads and nickel land heads then Allan wins

• if dime land heads and nickel land tail then Beth wins

• if dime land tail and nickel land heads then Carlos wins

• if dime land tail and nickel land tail then Denesha wins

Step-by-step explanation:

The method described above is fair since the probability of each case is 0.25.

If the two coins are flipped:

• The probability dime land head is 0.5

• The probability dime land tail is 0.5

• The probability nickel land head is 0.5

• The probability nickel land tail is 0.5

Then the probability dime land heads and nickel land heads is 0.5 × 0.5 = 0.25.

The other four cases are calculated similarly and their probability is also 0.25