Answer: Hence, Option 'D' is correct.
Step-by-step explanation:
Since we have given that
Probability of successful outcome = 0.7
Probability of unsuccessful outcome = 0.3
Amount he get for successful outcome = $900
Amount he lost for unsuccessful outcome = -$1800
We need to find the expected value of return when there is successful outcome:
P(Success)× Amount for successful

Hence, Option 'D' is correct.
1/2( b ( times ) h ) is the formula
Answer: <em>$20.56</em>
Step-by-step explanation:
<em>Let's take our given total and use this equation</em>
<em>25.70(n)</em>
<em>n will equal 0.80 in this case, as they left a 20% tip so we need to find out what 80% of 25.70 is first</em>
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<em>$20.56 is the total without the tip!</em>
40 is the answer sorry if I’m wrong
3/3=1 and 7/8 is < 1 so 3/3 is bigger