Problem Solving (PS) | Re: If m < p < r < t < z and if the product mprtz is positive, which of

for \(mprtz\) to be positive there must be an even number of negative numbers

The following are the possibilities for \(m < p < r < t < z\)
1.
\(-m*-p*r*t*z\)

\(mp, rt\) & \(tz\) are positive

2.
\(-m*-p*-r*-t*z\)

\(mp, rt\) are positive, but \(tz\) is negative.

So \(mp, rt\) must be positive

Answer is C



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Statistics : Posted by tgsankar10 • on 09 Jun 2024, 19:39 • Replies 1 • Views 398

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