please help

A recent study suggested that 70% of all eligible voters will vote in the next presidential election. Suppose 20 eligible voters were randomly selected from the population of all eligible voters. Find the probability that at least 13 of the eligible voters sampled will vote in the next presidential election. APPENDIX B Tables 877 TABLE II (continued) g. N = 15 05 .10 20 30 50 405 109 8GO 463 1206 035 1000 .000 990 829 549 167 3035 $005 -OOD 1.000 964 1816 395 127 6 023 900 1000 1.000 .995 ,344 648 297 DON .000 1,000 994 987 838 10:00 1000 000 1.000 1.000 .998 .939 .722 .0DO 1.000 1.000 1.00U .982 .869 015 .OOD 1000 1.000 996 950 -004 .000 1.000 1.000 1.000 .999 1985 131 1018 1.000 1,000 1,000 1.000 273 :061 10 1.000 1.000 1.000 1.000 991 94 .485 164 013 1.000 1,000 1.000 1.000 1909 703 .352 12 .000 1.OOD 1.000 1.000 1.0DO 1.000 .873 602 13 184 .036 1.000 1.100 1.000 1000 1.000 1.000 1000 833 14 451 -171 1010 1.000 1-000 1010 1.000 1.000 905 965 .537 .140