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Lapatulllka [165]
3 years ago
9

Mary and Beth are using weather to make bracelets. Mary has y inches of leather. Beth have 7 more inches of leather than Mary ha

s. They have to combine total 77 inches of leather. What is the value of y. Write an equation in solve
Mathematics
1 answer:
serious [3.7K]3 years ago
3 0
Equation=
y+7=77

77-7=70

The value of y is 70
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Answer: (a) \frac{2}{9}       (b) \frac{6}{41}

Step-by-step explanation:

(a) P( Bill hitting the target) = 0.7        P( Bill not hitting the target) = 0.3

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Now the chances that exactly one shot hit the target is = 0.7 x 0.6 + 0.4 x 0.3

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Chances that George hit the target is = 0.4 x 0.3 = 0.12

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(b) The numerator in the second part would be the same as of (a) part which is 0.12.

The change in the denominator will be that now we know that the target is hit so now in denominator we include the chance of both hitting the target at same time that is 0.4 x 0.7 and the rest of the equation is same as above i.e.

Given that the target is hit,probability that George hit it =                                                 \frac{0.4\times 0.3}{0.7\times 0.6 +0.4\times 0.3+0.4\times 0.7}  = = \frac{6}{41}                                                                        

                                                                                           

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