Answer:
<h2>The contestant should not play.</h2>Step-by-step explanation:
As per the given question, their current winning is $1 million.
The probability of the guessing to be true is 50% = .
There is also a possibility of 50% to be wrong, which can reduced the winning amount to $500,000 that is the half of the current amount.
Hence, the contestant should not play.