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Urgent! ! ! Math problems in grade two. Wait online! ! ! ! ! ! ! !
Solution:

The average distance between the target and the impact point of the shell is:

(40*0+30* 1+20*3+ 10*7+0*39)/50

= 3.2 meters

The average distance between the target and the impact point of shell B is:

(40* 1+30*3+20*2+ 10*3+0*4 1)/50

= 4 (m)

Because 3.2 < 4

Therefore, the average distance between the impact point of the projectile and the target is very small.

Therefore, the accuracy of armored gun is better.

Jiangsu Wu Yunchao wishes you academic progress.

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