There were total 276 guests in the wedding that Joy organised.
Given,
fraction of the guest that chose beef = 1/3
fraction of the guest that chose chicken = 5/12
fraction of the guest that chose vegetarian = 1 - 1/3 - 5/12 = 1/4
we are asked to find the total number of guests in the wedding:
guests that chose vegetarian = 1/4
guests that chose vegetarian = 69
1/4 of the guest = 69
4/4 of the guest = 69 x 4 = 276
Hence there are total 276 guests in the wedding.
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