B: step 2
You need to multiply the 7 with the 4.5
Answer:
Given that the probability of winning is = 0.05
So the probability of losing is = 1 - 0.05 = 0.95.
We are told we have a 1 in 20 chance
Success: 0.05
Failure: 0.95
P(X=4)= 0.95*0.95*0.95*0.05
So the chance is 0.04286 or Option D
Answer:
Since C is the mid point,
therefore, (6x - 4)/2 = 4x-3
=> 6x - 4 = 2X(4x-3) = 8x - 6
=> 6x - 8x = -6 + 4
=> -2x = -2
=> x = (-2)/(-2) = 1
Hence, CD = AC = 4x - 3 = 4X1 - 3 = 1
Step-by-step explanation:
The answer is 12:1
note: this is often read as "12 to 1"
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Explanation
We have exactly four card that are labeled "3" and 52 cards total. So there are 52-4 = 48 cards that are not labeled "3".
From here you write the ratio 48:4 to indicate the odds against drawing a 3. There are 48 ways to lose, 4 ways to win. You list the number of ways to lose first when it comes to "odds against" type of problems.
Next step is to reduce the ratio 48:4 to get 12:1, note how I divided both parts by the GCF 4
48/4 = 12
4/4 = 1
So thats how 48:4 reduces to 12:1
If you focus on one suit, say the spades, then we have 12 cards that arent a 3 of spades while exactly one card is a 3 of spades. This is one way to see why 12:1 is the answer. If you were saying this out loud to a friend, then you might say something like "the odds against drawing a three are 12 to 1".
