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shtirl [24]
3 years ago
10

An investment analyst has tracked a certain bluechip stock for the past six months and found that on any given day, it either go

es up a point or goes down a point. Furthermore, it went up on 25% of the days and down on 75%. What is the probability that at the close of trading four days from now, the price of the stock will be the same as it is today? Assume that the daily fluctuations are independent event
Mathematics
1 answer:
anastassius [24]3 years ago
7 0

Answer:

0.2109 or 21.09%

Step-by-step explanation:

In order to maintain the same price after two days, the stock must go up (U) on two days and go down (D) on two days, the sample space for this event is:

S={UUDD, UDUD, UDDU, DDUU, DUDU, DUUD}

There are 6 equally likely possible outcomes. The probability that the price of the stock will be the same as it is today is:

P =6* (0.25*0.25*0.75*0.75)\\P=0.2109=21.09\%

The probability is 0.2109 or 21.09%.

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The price of a shirt is reduced from $27 to $20. What percentage of the cost is the tip?
LekaFEV [45]

Answer:

Step-by-step explanation:

Finding the percentage of the cost that is the tip means finding the percentage of the reduction or fall in price on the initial price.

The initial price of the shirt is $27

There was a reduction in price from $27 to $20. Reduction in price is determined by subtracting the new price from the original price. Therefore

Reduction in price(tip) = 27 - 20 = 7

To determine the percentage of the cost that is the tip, we will divide the tip by the initial cost and multiply by 100. It becomes

7/127 × 100

= 25.93%

8 0
4 years ago
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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

7 0
3 years ago
A)<br>(+4) + ( - 3)<br>b) (-2) + (-3)<br><br>c)<br>(+2) + (+4) <br>d) (-6) + (+2) ​
dolphi86 [110]

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8 0
3 years ago
Last year, ginger cost $15 per kilogram. Due to a harvest shortage this year, the price of ginger has to increase by 15% per kil
Anastaziya [24]
<h3>Answer:    17.25 dollars</h3>

=======================================================

Explanation:

15% of 15 = 0.15*15 = 2.25

The cost has increased by $2.25 which means the cost per kilogram is now 15+2.25 = 17.25 dollars

------------

As a slight shortcut, we can multiply the old cost (15) by the multiplier 1.15 to get the same result:

1.15*15 = 17.25

This method allows us to chain together many percentage increases, and it also allows us to include percentage decreases as well. Note how 1.15 is basically the result of 100% + 15% = 1.00+0.15 = 1.15

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