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\(\pi\)
e
\(\frac{a}{b}\)
!
←
→
(
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\(\sqrt{\,}\)
\(a^{b}\)
7
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\(\div\)
log
ln
4
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\(\times\)
cos
cos⁻¹
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-
sin
sin⁻¹
0
.
=
+
tan
tan⁻¹
In a class of 30 students, what is the probability that at least two students share the same birthday? Assume a year has 365 days and birthdays are equally likely.
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