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C
(
)
⌫
π
e
7
8
9
\(\div\)
\(\sqrt{\,}\)
\(a^{b}\)
4
5
6
\(\times\)
\(\frac{a}{b}\)
ln
1
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-
cos
cos⁻¹
0
.
=
+
sin
sin⁻¹
←
→
!
tan
tan⁻¹
An urn contains 1 red ball and 4 blue balls. A first ball is drawn without replacement. Then a second ball is drawn from the remaining balls.
Find the probability that the second ball drawn is red :
\(P(R_2) = \)
del
\(\pi\)
\(e\)
\(x\)
\(n\)
\(\frac{a}{b}\)
\(\sqrt{\,}\)
\({x}^{2}\)
\(\sqrt{\,}\)
!
7
8
9
←
→
4
5
6
(
)
1
2
3
\(\times\)
\(\div\)
C
0
.
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-
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