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imam = 1/2 x 50 = 25 kelereng
rayhan = 1/5 x 50 = 10 kelereng
jumlah kelereng seluruhnya 50 + 25 + 10 = 85 kelereng
rayhan=1/5 . 50= 10 klrng
keduanya = 50 + 10 = 60 klrng