Cards with the numbers 1 through 40 are placed in a box and thoroughly shuffled.
What is the probability of randomly selecting a card with a number less than 10 or a multiple of 15?
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OpenStudy (anonymous):
A. 3/10
B. 11/40
C. 1/20
D. 7/400
OpenStudy (anonymous):
@pooja195
OpenStudy (anonymous):
b
OpenStudy (anonymous):
@amistre64
OpenStudy (anonymous):
it is not c or d 4 sure
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OpenStudy (anonymous):
@IrishBoy123
OpenStudy (irishboy123):
we just need to count the possible successful candidates
first: how many numbers between 1 through 40 are less than 10?
OpenStudy (anonymous):
9
OpenStudy (irishboy123):
i'd go with that
and how many numbers between 1 through 40 are a multiple of 15?
OpenStudy (anonymous):
38
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OpenStudy (anonymous):
not counting 1 and 40
OpenStudy (anonymous):
so 40
OpenStudy (irishboy123):
a multiple if 15
OpenStudy (anonymous):
oh yah forgot about that
OpenStudy (anonymous):
1, 3, 5, 15
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OpenStudy (irishboy123):
nah
"multilple"
15 x 1
15 x 2
15 x 3
etc
those are the multiples of 15
OpenStudy (anonymous):
oh
OpenStudy (anonymous):
15*1 to !5*2
OpenStudy (irishboy123):
bingo!
15 or 30
so how many cards in that box allows us to select a card with a card with number less than 10 or a card that is a multiple of 15 ?????
OpenStudy (anonymous):
i was correct c
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OpenStudy (anonymous):
i have one more
OpenStudy (irishboy123):
new thread!!!
OpenStudy (irishboy123):
and well done!!!
OpenStudy (anonymous):
Hitomi has a bag with four chips in it numbered 1 to 4. She randomly draws a chip and replaces it three times.
What is the probability that Hitomi will draw a 1 all three times?
OpenStudy (anonymous):
1/4
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OpenStudy (anonymous):
just tell me if i am |dw:1450571986681:dw|
OpenStudy (anonymous):
1/64
OpenStudy (anonymous):
@ikram002p
OpenStudy (anonymous):
@ParthKohli
OpenStudy (anonymous):
passed
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