Problematic Mathematics, or Simple Logic?

Discrete Mathematics Level 2

You have to choose 40 numbers, each having a value less than 100.

How many combinations can be made such that the average of these 40 numbers is greater than 120?

None of These \[\left( \begin{matrix} 40 \\ 10 \end{matrix} \right) \] 40 \[\left( \begin{matrix} 40 \\ 40 \end{matrix} \right) \] 120 59 \[\left( \begin{matrix} 40 \\ 25 \end{matrix} \right) \] 124

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Problematic Mathematics, or Simple Logic?

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Community

100 Day Summer Challenge

Problematic Mathematics, or Simple Logic?

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, conceptual quizzes.

Our wiki is made for math and science

Master advanced concepts through explanations, examples, and problems from the community.

Used and loved by 4 million people

Learn from a vibrant community of students and enthusiasts, including olympiad champions, researchers, and professionals.

Master advanced concepts through explanations,
examples, and problems from the community.

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.

Master advanced concepts through explanations,
examples, and problems from the community.

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.