mrp_rating_result.php

<?php
if ( function_exists( 'mrp_rating_result' ) ) {
  mrp_rating_result();
  // you can also pass in parameters such as the the post id if needed e.g. mrp_rating_result( array( 'post_id' => $post_id ) );
}

Do you have the Free or Pro version of Multi Rating? This is a Pro version specific function. Alternatively, in the free version you can use the do_shortcode WP function <?php echo do_shortcode( "[mr_rating_result]" );