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if the coin lands Heads, she answers True, and if it lands Tails, she answers False

one point per question, yeah?

9%...?

therefore P of 10 out of 14 flips being correct

= same as P of 10 out of 14 flips being heads

=8.9% chance

perl why did you keep 9 instead of 10. your answer when given gives wrong result.

it is 2.86% , dont listen to leena

yeppppppppppp thanku

how many decimals do you round?

i can explain more

ok so we have 14 questions we are looking at. right?

@leena1996 thankuuuuu very much

she needs 11 or more right answers to get an A , (out of 14 questions)

uh oh :/

ok i wont

we need 11 right or more to get an A , ok?

S = success (right answer)
F = fail (wrong answer )

leena, yes but there are more cases
S F S F S F S F ...

@leena1996 2.86 is correct

for X = exactly 11 right
SSSSSSSSSSFFF
SFSFSFSSSSSS
etc
we can rearrange S's and F's,

leena, wait

with me so far?

what are the possibilities.
probability = # of favorable / total outcomes

no, because theres

the *total* ways to get any right

4 favorable out of 16

but theres a way to do these without having to sit and write out all the cases

ok, what about the probability of getting 3 or more right on this test?