What is the overall percentage of marks obtained by ‘B’ in all subjects together (rounded off to two digits after decimal)?

The marks obtained by B in P are: 49% * 70 = 34.3

The marks obtained by B in Q are: 79% * 80 = 63.2

The marks obtained by B in R are: 62% * 120 = 74.4

The marks obtained by B in S are: 85% * 125 = 106.25

The marks obtained by B in T are: 56% * 75 = 42

The marks obtained by B in U are: 76% * 150 = 114

Total marks obtained = 34.3 + 63.2 + 74.4 + 106.25 + 42 + 114 = 434.15

Total marks possible = 70 + 80 + 120 + 125 + 75 + 150 = 620

Overall percentage = $$ \frac{Total.marks.obtained}{Total.marks.possible}*100$$ = $$ \frac{434.15}{620}*100$$ = 70.02%