t. In one country during one year,713500 women gave birth. Of these women, 2891
ID: 3110215 • Letter: T
Question
t. In one country during one year,713500 women gave birth. Of these women, 2891 gave birth to identical twins. Use these data to estimate how many women, out of a group of 1000 pregnant women, you might expect to give birth to identical twins. Choose the two comet options below. Select one or more: The expected number of women 41 The calculation is The calculation The expected number of women is 405. The expected number of women is 4. g.The chance of getting a particular disease sometime during your lifetime is estimated at 1 in 20. Smoking increases the risk of developing the disease during your lifetime by10%. How many people out of a group of 1000 smokers would you expect to get the disease sometime during their lifetime? h. The following equation has a positive and a negative solution. -2 4 5 Solve the equation and enter the positive solution in the box below (as an integer or rounded to one decimal place as appropriate).Explanation / Answer
(7) the probability of a women give birth to identical twin = 2891/713500
out of 1000 woman = (2891*1000) / 713500 = 4.0518 almost 4 women
so answer is (b) and (e)
(8) probability of getting a particular disease = 1/20
smoker increase this by 10% So new probability = 1.1/20
out of 1000 smoker = (1.1*1000) / 20 = 55
So the answer is 55
(9) (w-2)(w+5) = 4(w-1)
w2+3w-10 = 4w-4
w2-w-6=0
(w+2)(w-3) = 0
w = 3, -2
positive root w= 3
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