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Lana71 [14]
3 years ago
5

Of all the Sunny Club members in a particular city, 25% prefer swimming on weekends and 75% prefer swimming on weekdays. 10% of

the members in the city prefer swimming on weekends and are female. 55% of the members in the city prefer swimming on weekdays and are female. What is the probability that a randomly selected club member is female, given that the person prefers swimming on weekends? (A).19, (B).20, (C).24, (D).40, (E).55
Mathematics
1 answer:
mars1129 [50]3 years ago
6 0
The easiest way to solve this problem is to make a table, based on 100 total person

                     Prefer week ends            Prefer week days    Total

Female                10                                  55                        65

Male                    15                                   <span>20                       </span>35

Total                    25                                   75                      100

The bold numbers are conclusions. The plain numbers are data.

<span>The probability that a randomly selected club member is female, given that that person prefers swimming on weekends</span> is [10 / 25] =  0.40

Answer: option D. 0.40
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If all four dimensions of triangular prism having surface area as 288 is doubled than new surface area will be four times than the initial prism that is 1152 square unit.

<h3><u>Solution:</u></h3>

Given that  

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Need to evaluate new surface area if all four measurement of triangular prism is double.

Relation between surface area and the four dimensions of the triangular prism is given by following formula

Surface Area of triangular prism = bh + 2ls + lb

Where h is height of the prism , b is length of base of the prim , l is length of the prism and s is side length of the prism.

Given that Area of triangular prism = 288 square unit

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Doubling the four dimensions means replace b by 2b, l by 2l , s by 2s and h by 2h in formula of Surface area of triangular prism.

\text { We get Surface area of new triangular prism }=2 b \times 2 h+2 \times 2 l \times 2 s+2 l \times 2 b

\begin{array}{l}{=4 \times b h+4 \times 2 l s+4 \times l b} \\\\ {=4(b h+2 l s+l b)}\end{array}

=> Surface area of new triangular prism = 4 (bh + 2ls +lb)  

=> Surface area of new triangular prism = 4 x 288 = 1152 square unit.

Hence we can conclude that if all four dimensions of triangular prism having surface area as 288 is doubled than new surface area will be four times than the initial prism that is 1152 square unit.  

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