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Are Two Heads Really Better than One?

Two students collaborating
There are two students in Mr. Jones’ English class. Each of these students usually gets a D (60-69%) on their weekly spelling tests. Mr. Jones announces that next week’s spelling test will be taken in pairs. If each of these D students independently has a 69% chance of knowing how to spell each word correctly and knows which words they can and cannot spell (no one will guess how to spell a word they do not know how to spell for sure), what grade will they earn if they collaborate on that spelling test?
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