How many code symbols can be formed using 3 out of 7 letters of A, B, C, D, E, F, G if the letters:a) are not repeated?b) can be repeated?c) are not repeated but must begin with D?d) are not repeated but must begin with DE?For each part, give the answer using permutation notation, factorial notation, or other operations. Then evaluate.b) What is the answer using the proper notation?O A. 7B. 7P3D. 7!OC. 7!-3!O E. 1 6P2OF. 73OG. 6!H. 7P7There arepossible code symbols.(Simplify your answer.)Toet OverviewTest: Practice Final How many code symbols can be formed using 3 out of 7 letters of A, B, C, D, E, F, G if the letters:a) are not repeated?b) can be repeated?c) are not repeated but must begin with D?d) are not repeated but must begin with DE?For each part, give the answer using permutation notation, factorial notation, or other operations. Then evaluate.a) What is the answer using the proper notation?O A. 7P3В. 7!-3!O C. 1 6P2O D. 7P7O E. 7O F. 6!OG. 7!O H. 73There are 7 possible code symbols.(Simplify your answer.)

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How many code symbols can be formed using 3 out of 7 letters of A, B, C, D, E, F, G if the letters: a) are not repeated? b) can be repeated? c) are not repeated but must begin with D? d) are not repeated but must begin with DE? For each part, give the answer using permutation notation, factorial notation, or other operations. Then evaluate. b) What is the answer using the proper notation? O A. 7 O B. 7P3 D. 7! ОС. 71-31 O E. 1 6P2 F. 73 G. 6! O H. 7P7 There are possible code symbols. (Simplify vour answer.) O O O O