某射击运动员在同一条件下进行练习,结果如下表所示:
0 55557 55565 55571 55575 55581 55583 55587 55593 55595 55601 55607 55611 55613 55617 55623 55625 55631 55635 55637 55641 55643 55647 55649 55651 55652 55653 55655 55656 55657 55659 55661 55665 55667 55671 55673 55677 55683 55685 55691 55695 55697 55701 55707 55713 55715 55721 55725 55727 55733 55737 55743 55751 266669
射击次数 | 10 | 20 | 50 | 100 | 200 | 500 |
击中10环的次数 | 8 | 19 | 44 | 93 | 178 | 453 |
(1)计算表中击中10环的各个频率;
(2)这名射击运动员射击一次,击中10环的概率是多少?