Jennifer has two pennies. She flips both pennies 105 times each. How many times can she expect both pennies to come up heads simultaneously?
Assuming I have correctly interpreted your question,
The probability both coins come up heads is [tex] \frac{1}{2} * \frac{1}{2} = \frac{1}{4} [/tex]
Thus the expected number of simultaneous heads is 105/4 or 26.25
