A 3 ft by 5 ft wooden board has three equally sized circles cut out of it. A penny will be randomly tossed onto the board. What is the probability the penny will fall through any of the holes?
@david111 @acxbox22

Question

A 3 ft by 5 ft wooden board has three equally sized circles cut out of it. A penny will be randomly tossed onto the board. What is the probability the penny will fall through any of the holes?
@david111 @acxbox22

anonymous · Answer

I got 16%

acxbox22 · Answer

dont you have measurements for the circles?

anonymous · Answer

1 inch circles .

acxbox22 · Answer

1 inch in area or radius or diameter?

acxbox22 · Answer

and how did you get 16%?

anonymous · Answer

there is a 5.29% chance it falls in the center hole so I added 5.29% 3 times for the three holes and got 16% and it is a 1 inch diameter.

anonymous · Answer

area of the board = 3*5 = 15 sq. ft. 
area of a circle = pi*R^2

acxbox22 · Answer

find the area of the circle and multiply by 3
find area of rectangle
circle total area/rectangle area is your probability

campbell_st · Answer

convert the board measurements to inches... before finding the area... 

then the probability will be

P(penny falls through) = area of 3 holes/area of the board

anonymous · Answer

i got 8.3%

campbell_st · Answer

@Faith_Rochelle do you think you could post the entire question.... as it seems you are given some information about whether the penny falls though or not

acxbox22 · Answer

hint:
area of one circle is about 0.785
area of rectangle is 2160

acxbox22 · Answer

answer is about 0.011%

anonymous · Answer

faith what is choices

anonymous · Answer

@campbell_st  that is the entire question . @acxbox22 that is not a choice. 
3%
16%
32%
63% 
^^^ choices .

campbell_st · Answer

so how do you know 5.29% of the centre circle...?

anonymous · Answer

https://answers.yahoo.com/question/index?qid=20110209125336AAi0dfX

acxbox22 · Answer

i know how you got %16 percent and it is right
the question you gave us is incomplete
the circles are probably 1 feet diameter or the board is 3x5inches

anonymous · Answer

thats  1 foot u have 1 inch diamter

acxbox22 · Answer

exactly..

anonymous · Answer

lol

anonymous · Answer

I meant one foot . I am sooo sorry . I am just really sleepy . My bad .

acxbox22 · Answer

yeah your answer is 16%

anonymous · Answer

Mrs. Brown gives two tests to her class. 30% of the class passed both tests and 45% of the class passed the first test. What percent of those who passed the first test also passed the second test?

anonymous · Answer

-_-

anonymous · Answer

I asked my friend that is a senior about that one ^^ I just posted and she said it is 75% because you add 30 and 45 .. but that does not seem right to me . Any suggestions ? @acxbox22

anonymous · Answer

66.67%

anonymous · Answer

In other words 67% ? @david111  & how did you get that ?

acxbox22 · Answer

the answer is in your question!
it is 30%

anonymous · Answer

https://answers.yahoo.com/question/index?qid=20110520172933AAdOrwO

campbell_st · Answer

is the daimeter 1 ft...?

acxbox22 · Answer

your question asks how many people passed the first and second test
and it say 30% passed both tests!

acxbox22 · Answer

troll question

anonymous · Answer

The choices are
15%
33%
67%
75%

acxbox22 · Answer

according to my logic of course

anonymous · Answer

it has to be 67%

acxbox22 · Answer

@david111 will you please use your own mind and not rely on answers from yahoo
and if you believe that is the answer than will you please explain

anonymous · Answer

yea its 75%

anonymous · Answer

30+45% passed test = 75%

anonymous · Answer

actually 55% didnt pass second test

acxbox22 · Answer

well you cant just throw around percents like that
they are not regular integers

anonymous · Answer

i honostly think its 15%
campbell_st

anonymous · Answer

ignore the campbell