Given that Aishwarya studied CS on Monday,so possible scenarios are-:
$\text{MON TUE WED}$
$\text{1.CS MATHS MATHS}$
$\text{2.CS MATHS CS}$
$\text{3.CS CS MATHS}$
$\text{4.CS CS CS}$
case $1$ and $3$ will be discarded as the question is asking the probability that she studies computer science on Wednesday
Given that
- $\text{CS} \rightarrow \text{MATHS}=0.6$
- $\text{MATHS} \rightarrow CS=0.4$
- $\text{CS} \rightarrow \text{CS} =0.4$
- $\text{Maths} \rightarrow \text{Maths} =0.6$
Considering Case $2$ and $4$ we need to find their respective probability.
case $2 -: 0.6 \times 0.4$
case $4-: 0.4 \times 0.4$
Required proabaility=$0.24+.16=0.4$