Answered

Discover the best answers to your questions with the help of IDNLearn.com. Our experts provide prompt and accurate answers to help you make informed decisions on any topic.

The average of the weights of six people sitting in a boar is 145 pounds. After a seventh person gets into the boat, the average of the weights of all seven people in the boat is 147 pounds. What is the weights ( in pounds ) of the seventh person ?

a) 160, b) 159, c) 155, d) 149, e) 147

Sagot :

Konrad509idn
x - weight of six people
y - weight of 7th person

[tex]\frac{x}{6}=145\\ \frac{x+y}{7}=147\\\\ x=870\\ x+y=1029\\\\ 870+y=1029\\ y=159\ lb\Rightarrow B[/tex]
Weight : 

⇒ x for 6 people
⇒ y for the 7th person

[tex]x/6=145 \\ (x+y)/6=147 \\ \\ x=145*6 \\ x=870 \\ \\ x+y=1029 \\ \\ 870+y=1029 \\ y=1029-870 \\ y=159[/tex]

The correct answer is B).
We value your presence here. Keep sharing knowledge and helping others find the answers they need. This community is the perfect place to learn together. Find clear answers at IDNLearn.com. Thanks for stopping by, and come back for more reliable solutions.