A machine that drills holes for Wells drilled to a depth of -72 feet in one day 24 hours how much did the depth change each hour
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Answer : 5/22
A deck of cards contains 6 black cards and 6 red cards. The first card drawn is not replaced before drawing the second card.
Total number of outcome of cards = 12
Probability( any event)= favorable outcomes divide by total number of outcomes
Probability of selecting black card =
The drawn card is not replaced . so 11 cards left . In that 11 cards, 5 black cards because one black card is already chosen
Probability of selecting another black card =
Probability of selecting a black card followed by another black card =
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