Answer:
Step-by-step explanation:
Probability of drawing a heart from one deck:
Therefore, probability of drawing a heart from each of 3 decks:
What is the opposite of - 1/4 ?
1 answer:
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After enlargement :
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Answer:
Step-by-step explanation:
x and 52 are supplementary, so they add up to 180°
Answer:
This indicates that the chances of the mean life span today is greater than 70 years is 0.5871
Step-by-step explanation:
The past year showed an average life span of 71.8 years.
Population standard deviation = 8.9 years
We are supposed to find the mean life span today is greater than 70 years
i.e. P(X>70)
Formula :
Z=−0.202
P(X<70)=0.4129
P(X>70)=1-P(X<70)=1-0.4129=0.5871
Hence This indicates that the chances of the mean life span today is greater than 70 years is 0.5871