Book Maths Puzzle Numerical Ability

How Many Zeroes Will be there at the end of the expression (2!)^2! +(4!)^4! +(8!)^8! +(9!)^9! +(10!)^10! +(11!)^11! ?

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Book Other Question

A can hit the target 3 times in 6 shots, B 2 times in 6 shots & C 4 times in 6 shots. They fire a volley. Whats the probability that at least 2 shots hit?
Options
1/2
1/3
2/3
1/4
3/4
A no. Is by mistake divided by 5 instead of being multiplied by 5 wat is the % error
??